My background is in analytical chemistry and I'm specialized in optimisation. Your video are soooooo deligthfull for me!!! You are a verrry smart guy and you explain very well your idea, steps, thesis, conclusion, errors factors as well as possible room for improvment and other path to try. JUST TH-cam AT ITS BEST thank you so much for sharing!!!! Alex from Québec, Canada
I tend not to agree with you sir. He lacks the scientific discipline needed to ferret out the details in his experiment. Where is his control group? And sufficient data recording and analysis. He stated his system is in a (cold) garage, so where is the pump? Near a CO source? Even if only a brief exposure, can mean significant growth challenges to a delicate life form. I don't dislike the man, but I certainly question the unbiased opinion of the man. Kratky works, and that is good. But we stand at the precipice of global starvation and poor science doesn't help the masses. We need to seek the optimal solutions that everyday people can use to feed themselves and family, and hopefully some of the community.
@@bryanst.martin7134 he is presenting a simple over view of his findings for what and where his grow system is, if you had viewed some of his other videos he keeps track of some data and, could he present it - yes, does he need to - maybe. if people need they can and would ask in comments as to what data he had i am sure he would answer. he could do data recorders day by day of temp. - tds - ec K - Kh specific mineral test and more and overwhelm viewers that wouldn't have a clue or care . he is presenting a simple basic comparison video of what he has found, its not an argue of does or doesn't he have the scientific disciplines, i've grown both methods i have recorded data of plant mass versus numerous variations including those as simple and light exposure of varying degree of light spectrum that simulate early or late day and seasonal change of light and how they change the overall red versus blue spectrum and affects. but this is not what he is presenting he is letting those beginning as to his observations for his own person system they will take away the data they can fathom and understand or interested in and put it to use in their own way. so yes he is presenting it in a manor usable for many new to hydroponics to think about, my suggestion find and use the system you feel comfortable with for you ability and as you go see what can or cannot improve on it. remember KISS process
you put so much thought and effort into this its easy to see. I can't imagine the energy that went into this that we can't see. Thanks for sharing all of this
Hey, nice experiment. One of your problems I'm thinking of from the water PH lowering is carbonic acid. When aeration happens you are mixing atmospheric gases with the water
the ph down effect is caused by the air itself. it is the mostly the co2 turning it to COOH- acid if solved in water. in my theory if you mix your nutrient solution in the tank activate the airpump for 20 min and then adjust the ph once it should stay stable for a few days before it alters again. if you fit a ph sensor and arduino with a solutionpump you could stabilize the ph. if you would use low concentrated amonia as PH up solution, you have a nice way of providing more nitrogen to the plants.
Awesome, I'm glad I didn't have to do this myself. The next question I would ask is whether or not the aeration method has better effects in the case in the long term, i.e 1+ years with the same plant.
Thanks Ryan for being so thorough. I'm glad it doesn't hve much difference as I am on a low budget and would like to start my own little hydroponic garden. Keep up the great content. I'm subbed.
Thanks for doing that test. I'm new to all this so you just answered one of my questions with this test. New to your channel so far I like your vows thanks...
I haven’t heard about Amour Si before. I’ll try using it. How much Amour Si did you add? A much better method to create holes for the net pots is to use a hole saw bit and an electric drill. The pilot hole is drilled forward, and the larger hole is drilled in reverse. When drilling reverse, the edge of the hole are clean and smooth every time. Make sure that the hole saw can be run in reverse without removing the hole saw bit from the mandible. Not all hole saw bits work in reverse. The hole saw size is critical for net pots. There are 4 hole saw sizes that work best for the common net pot sizes. The best hole saw sizes I’ve found are 51mm, 75mm, 3-5/8, and 5-1/4. These specific sizes are hard to find at stores, but are easy to find on-line. After you create your net pot holes with a hole saw that can be run in reverse for the net pot hole, you will never use the Dremel tool again for creating the net pot holes in your containers.
Very interesting! pH gets lower with air system. pH is more stable in Kratky system. Silica is absorbed by the plants and branches are stronger. Thank you very much!
I wonder if topping up the water/nutrient level to the bottom of the netcup as you would typically do in DWC would have given you the results we were all initially expecting? I realize that you're only trying to determine the difference between aeration and non-aeration, but you're not fully able to take advantage of aeration due to the lack of water/nutrients in the DWC bucket. As far as I understand, the whole point of DWC is to keep the roots submerged in water to absorb significantly more water, nutrients and oxygen instead of being left to become air roots. The DWC is a little more hands-on than Kratky, but there are benefits to be had if you take advantage of aeration.
i agree with this. if we look at both buckets half way and on, they look both like a kratky set up just obvy one has the air stone. the air roots get the max air they need prb more so than the roots in the aerated water. i agree with you, redo exp with the same water lever on the dwc, the whole time through.
3:21 Good video, but it sounds like the question you asked yourself at 3:14 was a very good one, and the response you gave to that question at 3:21 was, relatively speaking, not good. When doing an experiment, its best to exaggerate everything as far as you can and push everything to the extreme so that if there is a difference, it shows up more clearly. For instance, if i wanted to test how light effects plants, I could put one plant outside my house and one plant inside my house. However a better experiment that would give much, MUCH better and more conclusive results, would be to put one plant outside and one plant in a pitch-black room that has 0% light leakage. In the second example, if light does effect plants, it will show up without question. In the first one, it may or may not show up.
The interesting thing is that you would think that along with the greater oxygen the aeration circulates the nutrients, making sure the roots always get a fresh source of nutrition, but apparently sitting in stagnant water works just as well. BTW that is some happy looking basil! how many hours a day was the light on?
Love what you’re doing thanks so much. Kratky is so much easier to implement. Love the kitty litter containers! Curious if those are food grade. It would probably read HDPE(2) on the bottom.
In DWC aren't the roots almost 100% submerged in the water? In the few frames where the water levels were shown it looked as if the water levels were low and exposing a significant percentage of the roots to the air as per the Kratky method.
but then you arnt comparing true dwc, as good goat says. you are comparing aerated kratkey vs kratkey. but in your video you keep trying to call it dwc?
Very good experiment. My question is, if it is supposed, that you should not replenish the water in the kratky method, the salts will accumulate in the bottom ... how do you control the ec, if you can not add more water?
HidroGourmet I usually had water twice and then do a change out. The salts only accumulate if the solution becomes basic or if the reservoir gets too low on water. Which never really happens unless someone adds ph up or doesn’t do top offs. Even if it doesn’t become basic while adding ph up, if it’s added directly then some minerals can fall out of solution where the base contacted it before it mixed and diluted. Kratky isn’t about not adding water, it about allowing roots to be exposed to open air. Usually the bottom half to 1/3 of roots sit immersed.
I grew basil using Kratky in a mason jar and after 6 months, the roots were shaped like the mason jar and could barely remove to re-fill with water. Lol. And the stems became wood. I am just starting with DWC now. Never realized silica was important. I noticed my kratky kale stems were very weak vs soil
TheJamesOutlaw silica isn’t always noticeably helpful. Depends on various things. But it’s not like it’s not needed. As far as your kratky jar goes, it makes sense for how long you grew it. Sometimes I think plants can grow too fast in hydro and not deposit enough silica for stronger stems. Many plants that grow slower have time to continuously deposit silica so it’s not always lack of silica that’s the problem. It takes time for some plants to harden off. Topping usually helps cuz it gives the plant time to do so.
Here's a question for you, have you considered the source of the air, the temperature differences, and the possibility that the aeration is Oxidizing the nutrients?
@@GrowingAnswers good point. I'm guessing they are safe to use since you are using them. They really are the perfect free bucket for this setup. I wish I hadn't thrown so many away in the past.
Nice to see we can do about equal without the pump noise for those of us living in a small space. About Kratky, the buckets in video look pretty deep, have any idea about how much air space is needed for roots to be well oxygenated vs too little air space ? _I have this question because i was looking at the Hydrofarm kratky Salad Box & looks pretty neat but kind of shallow compared to many DIY kratky videos...
Usually you just let the water level drop down. It will grow as long the roots are touching water. Id say at least 1/8 the length of the roots should be submersed. Once the level drops below half the length, never fill it above halfway again. The depth of the container really is not all that important. but less water volume means more attention is needed.
Please answer why the root hate light? And also answer : If we add an aeration into the hydroponic nutrient tank on NFT system, can the dissolved oxygen in the nutrient tank be brought up to the top of the installation pipe or this metode can only work on kratky system? Iv'e been asking this to many people but still can't get the right answer for me. Sorry for my English.
I can’t fully answer the roots question. However, uv light from sunlight is bad for roots and the microorganisms that are part of the symbiotic system that the roots use, can be sterilized by uv light. Roots tend to die after too much light exposure. As far as oxygen goes, yes if you aerate an reservoir external of the planted containers then it will have enough oxygen, but in that case it’s no longer defined as kratky. Kratky simply has roots partially exposed to air with no need for aerated water.
@@GrowingAnswers In my country, the NFT system uses pipes as a place for plants to be planted and for places where nutrients are mixed is in an external reservoir where we use water pumps to carry nutrients to each plant pipe. Sorry if i have to ask you about this two times, If we aerated the external reservoir, will the dissolved oxygen be able to be carried by the pump through the pipe so the plants can have more oxygen even if just a little oxygen? If yes, how far the oxygen can goes? Thank you.
So after some personal failures with both kratky and DWC, I realised I'm doing something terribly wrong and it raises the pH level. And at the first video I thought I finally had an answer, that pH can raise a lot if there is intensive aeration. But now, it seems to have an opposite effect?
@@litano Kratky is great for simplicity and any aerated solution is going to work better or at least grow faster. True DWC in my opinion seems kind of pointless. Completely submersing the roots entirely doesn’t seem to be any better than just immersing the roots with aeration
Hello ryan, thx for sharing your experiment. By the way, why don't you add small fish like tetras in the bucket ? They could use the oxygen and you got free fertilizer for the plant
I wonder if starting it at a slightly high PH to start with would adjust for the depletion effect that happens with aeration over time? Also, I noticed that your Kratky plants had more leaf curling than the aerated ones. I have Kratky going right now and notice this in my plants too. I wonder what this is exactly; a nutrient deficienc,y or some sort or sensitivity to the lights that affects the Kratky more than the aerated ones?
IAMGiftbearer I think it has something to do with calcium and either too much or not enough light. specifically I don’t know. I wasn’t paying as much attention to that because nutrient uptake wasn’t one of the main observations. There are a lot a variables when it comes to chemistry and lighting. In order to understand that, I’d have to grow a single plant and adjust the lighting first to see how it effects it. Can’t really do that while running another experiment though. What I can say is that the less light the pepper plants have, the more crinkly the leaves get radiating outward from the center of intensity.
IAMGiftbearer I’m thinking the lead curl is a reaction to not getting water to the leaves so well - I bet the aerated one is better hydrated internally once you get further from the root
I have started some tomato seedlings in 3" net cups with clay pebbles. They are around 10 days old and 1 - 2 true leaves appear on them. I am doing it krtaky in small plastic jar. The roots are not coming out of the net cup. The nutrient solution is just touching the bottom of the net cup. What could be the issue and how can I fix it? Thanks.
The commonly known DWC is not true DWC. What this so-called DWC method does is adding oxygen to a water volume similar to Kratky's since the plants are of fixed height instead of plants floating directly on top of the water in true DWC. As a result, all those oxygen bubbles create mist/water droplets that take time to runoff to the reservoir, decreasing the water content in the reservoir and maybe increasing pH? In other words, the oxygen pump only works in the beginning when the water volume is high, at the cost of creating mist and lowering pH; and when the plants have sucked up a lot more water and nutrition, the oxygen pump should become less effective since a smaller and smaller portion of the root is submerged.
Getting a little more scientific than this experiment is intended to be. No I didn't get to that detail, but I did taste them and they tasted the same.
I have a question: when you're growing in these experiments, in the tents or just in your basement or wherever else in your house, what are the temps (the high and low temps)? Thanks.
Oh really? I would've thought warmer than that, in the 75*+ range. I guess it's not very much wattage from those particular leds you're using. Cool, thanks.
Aerating your water not only adds oxygen to your water but also carbon dioxide (CO2). When carbon dioxide dissolves in water it produces carbonic acid (H2CO3). So my guess: this weak acid lowers the pH of your water.
Aeration changes the ph as well. As nitrates are absorbed they leave hydrogen ions in the water as well that make the water slowly more acidic. However the plants generally like acidic water.
kratky roots breathe from the roots above water level. the water level should be lowered to half of root length or half of bucket height which ever after the roots have grown long so that plenty of air roots grow and the plant has plenty of air and co2 which it draws thru the roots. kratky is amazing bcuz usually water has depleted oxygen in 3 days and in 14 days it starts growing bacteria but in kratky the roots are so well aerated that it doesnt matter. i change water once a week thou bcuz i use low ppm nutes. i dont want to give strong nutes so no burns.
Amazing videos man, I still have a question, What kind of plants do you think doesn't need aeration?? So we can grow them with the "Kratky method". Greetings from Argentina
fech lettuce or most herbs grow well in kratky. There is no such thing as not needing aeration. It’s just that some plants grow just as well without it. All plants are going to benefit in some way from aeration. If not the plant, then the solution certainly will. Less anaerobic bacteria.
You talk about the PH dropping? This does not happen as water evaporates, it goes higher. We constantly fight PH CLIMB or "PH creep", thus your results you speak of contradict the norm. It's interesting you use tap water, but you don't really know exactly what is in it, you also do not speak of nutrients in this second video, I assume you are doing same as first video. Many recommend a PH of 5.5 for incoming water changes, as PH creeps up as water evaporates (Kratky or DWC ) and so the PH can creep up to 6.5 in 1 or 2 days.
Why guess? Take Harley Smith's classes sponsored by npk nutrients. He will explain what the 17 nutrients are and how to use them. His classes are 12 weeks online . It was the best 100.dollars I have ever spent.
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My background is in analytical chemistry and I'm specialized in optimisation. Your video are soooooo deligthfull for me!!!
You are a verrry smart guy and you explain very well your idea, steps, thesis, conclusion, errors factors as well as possible room for improvment and other path to try.
JUST TH-cam AT ITS BEST
thank you so much for sharing!!!!
Alex from Québec, Canada
I tend not to agree with you sir. He lacks the scientific discipline needed to ferret out the details in his experiment. Where is his control group? And sufficient data recording and analysis. He stated his system is in a (cold) garage, so where is the pump? Near a CO source? Even if only a brief exposure, can mean significant growth challenges to a delicate life form. I don't dislike the man, but I certainly question the unbiased opinion of the man. Kratky works, and that is good. But we stand at the precipice of global starvation and poor science doesn't help the masses. We need to seek the optimal solutions that everyday people can use to feed themselves and family, and hopefully some of the community.
@@bryanst.martin7134 he is presenting a simple over view of his findings for what and where his grow system is, if you had viewed some of his other videos he keeps track of some data and, could he present it - yes, does he need to - maybe. if people need they can and would ask in comments as to what data he had i am sure he would answer. he could do data recorders day by day of temp. - tds - ec K - Kh specific mineral test and more and overwhelm viewers that wouldn't have a clue or care . he is presenting a simple basic comparison video of what he has found, its not an argue of does or doesn't he have the scientific disciplines, i've grown both methods i have recorded data of plant mass versus numerous variations including those as simple and light exposure of varying degree of light spectrum that simulate early or late day and seasonal change of light and how they change the overall red versus blue spectrum and affects. but this is not what he is presenting he is letting those beginning as to his observations for his own person system they will take away the data they can fathom and understand or interested in and put it to use in their own way. so yes he is presenting it in a manor usable for many new to hydroponics to think about, my suggestion find and use the system you feel comfortable with for you ability and as you go see what can or cannot improve on it. remember KISS process
@Rory Daniel Rory Daniel and Lennox Vance, why are you spamming so many channels?
Alexander's background is analytical chemistry you couldn't get much higher praise!!.... There is some sweet sweet science going down here.🙏
I'm about to start an indoor garden and guess who my guru is... thank you for sharing your knowledge.
you put so much thought and effort into this its easy to see. I can't imagine the energy that went into this that we can't see. Thanks for sharing all of this
Hey, nice experiment. One of your problems I'm thinking of from the water PH lowering is carbonic acid. When aeration happens you are mixing atmospheric gases with the water
The lowering of the pH may be the bubbling air dissolving CO2 and creating Carbonic acid.
Bingo
the ph down effect is caused by the air itself. it is the mostly the co2 turning it to COOH- acid if solved in water.
in my theory if you mix your nutrient solution in the tank activate the airpump for 20 min and then adjust the ph once it should stay stable for a few days before it alters again.
if you fit a ph sensor and arduino with a solutionpump you could stabilize the ph.
if you would use low concentrated amonia as PH up solution, you have a nice way of providing more nitrogen to the plants.
Tacker Massacker that's what I was thinking...carbonic acid. Instead of keeping it keeping it in balance, it absorbed it more.
It is possible that there was more bacterial growth with the aeration that lowered the pH.
Just started growing using Kratky and have not used DWC, yet. Thanks for the help, the videos are well made with great info.
Brett Golden thanks! You are welcome.
Awesome, I'm glad I didn't have to do this myself. The next question I would ask is whether or not the aeration method has better effects in the case in the long term, i.e 1+ years with the same plant.
Thanks Ryan for being so thorough. I'm glad it doesn't hve much difference as I am on a low budget and would like to start my own little hydroponic garden. Keep up the great content. I'm subbed.
Thanks for doing that test. I'm new to all this so you just answered one of my questions with this test. New to your channel so far I like your vows thanks...
I love the way you used the kitty litter bins ..
I haven’t heard about Amour Si before. I’ll try using it. How much Amour Si did you add?
A much better method to create holes for the net pots is to use a hole saw bit and an electric drill. The pilot hole is drilled forward, and the larger hole is drilled in reverse. When drilling reverse, the edge of the hole are clean and smooth every time. Make sure that the hole saw can be run in reverse without removing the hole saw bit from the mandible. Not all hole saw bits work in reverse.
The hole saw size is critical for net pots. There are 4 hole saw sizes that work best for the common net pot sizes. The best hole saw sizes I’ve found are 51mm, 75mm, 3-5/8, and 5-1/4. These specific sizes are hard to find at stores, but are easy to find on-line.
After you create your net pot holes with a hole saw that can be run in reverse for the net pot hole, you will never use the Dremel tool again for creating the net pot holes in your containers.
Very interesting! pH gets lower with air system. pH is more stable in Kratky system. Silica is absorbed by the plants and branches are stronger. Thank you very much!
I wonder if topping up the water/nutrient level to the bottom of the netcup as you would typically do in DWC would have given you the results we were all initially expecting? I realize that you're only trying to determine the difference between aeration and non-aeration, but you're not fully able to take advantage of aeration due to the lack of water/nutrients in the DWC bucket. As far as I understand, the whole point of DWC is to keep the roots submerged in water to absorb significantly more water, nutrients and oxygen instead of being left to become air roots. The DWC is a little more hands-on than Kratky, but there are benefits to be had if you take advantage of aeration.
i agree with this. if we look at both buckets half way and on, they look both like a kratky set up just obvy one has the air stone. the air roots get the max air they need prb more so than the roots in the aerated water. i agree with you, redo exp with the same water lever on the dwc, the whole time through.
3:21 Good video, but it sounds like the question you asked yourself at 3:14 was a very good one, and the response you gave to that question at 3:21 was, relatively speaking, not good. When doing an experiment, its best to exaggerate everything as far as you can and push everything to the extreme so that if there is a difference, it shows up more clearly. For instance, if i wanted to test how light effects plants, I could put one plant outside my house and one plant inside my house. However a better experiment that would give much, MUCH better and more conclusive results, would be to put one plant outside and one plant in a pitch-black room that has 0% light leakage. In the second example, if light does effect plants, it will show up without question. In the first one, it may or may not show up.
Those containers work very well for my outdoor Hydro strawberries
Silica does have an effect, but as you said it was not only Silica since it has Potassium (K) which is known to help plants stay stiff
So much talk to such a simple experiment is fantastic.....
The interesting thing is that you would think that along with the greater oxygen the aeration circulates the nutrients, making sure the roots always get a fresh source of nutrition, but apparently sitting in stagnant water works just as well. BTW that is some happy looking basil! how many hours a day was the light on?
Love what you’re doing thanks so much. Kratky is so much easier to implement. Love the kitty litter containers! Curious if those are food grade. It would probably read HDPE(2) on the bottom.
They're not food grade
cool bins! where did you get them?
In DWC aren't the roots almost 100% submerged in the water? In the few frames where the water levels were shown it looked as if the water levels were low and exposing a significant percentage of the roots to the air as per the Kratky method.
Dwc is technically full submersion. But what most people call dwc is actually just aerated kratky. And the shots were during a water change.
but then you arnt comparing true dwc, as good goat says. you are comparing aerated kratkey vs kratkey. but in your video you keep trying to call it dwc?
Amazing results! Residual DO as good as augmented DO... who would have thunk it?
Funny the transition at 2:30 ; not only the plants have grown! lol
Very good experiment. My question is, if it is supposed, that you should not replenish the water in the kratky method, the salts will accumulate in the bottom ... how do you control the ec, if you can not add more water?
HidroGourmet I usually had water twice and then do a change out. The salts only accumulate if the solution becomes basic or if the reservoir gets too low on water. Which never really happens unless someone adds ph up or doesn’t do top offs. Even if it doesn’t become basic while adding ph up, if it’s added directly then some minerals can fall out of solution where the base contacted it before it mixed and diluted.
Kratky isn’t about not adding water, it about allowing roots to be exposed to open air. Usually the bottom half to 1/3 of roots sit immersed.
I grew basil using Kratky in a mason jar and after 6 months, the roots were shaped like the mason jar and could barely remove to re-fill with water. Lol. And the stems became wood. I am just starting with DWC now. Never realized silica was important. I noticed my kratky kale stems were very weak vs soil
TheJamesOutlaw silica isn’t always noticeably helpful. Depends on various things. But it’s not like it’s not needed. As far as your kratky jar goes, it makes sense for how long you grew it. Sometimes I think plants can grow too fast in hydro and not deposit enough silica for stronger stems. Many plants that grow slower have time to continuously deposit silica so it’s not always lack of silica that’s the problem. It takes time for some plants to harden off. Topping usually helps cuz it gives the plant time to do so.
I’m curious how the Ebb and Drain compares to the D.W.C and Kratky ?
It should be about the same as dwc
Here's a question for you, have you considered the source of the air, the temperature differences, and the possibility that the aeration is Oxidizing the nutrients?
What air stone is that?
I love using the kitty litter containers.
Are kitty litter buckets food safe? I got a bunch of them but figured they aren't "food grade".
Food grade and food safe are two Different things actually.
@@GrowingAnswers good point. I'm guessing they are safe to use since you are using them. They really are the perfect free bucket for this setup. I wish I hadn't thrown so many away in the past.
Engineer Cat short answer is yes. Not may type of plastics used for containers you’ll find in a store aren’t food safe.
So useful data. Esp on Silicon👌
Nice to see we can do about equal without the pump noise for those of us living in a small space. About Kratky, the buckets in video look pretty deep, have any idea about how much air space is needed for roots to be well oxygenated vs too little air space ? _I have this question because i was looking at the Hydrofarm kratky Salad Box & looks pretty neat but kind of shallow compared to many DIY kratky videos...
Usually you just let the water level drop down. It will grow as long the roots are touching water. Id say at least 1/8 the length of the roots should be submersed. Once the level drops below half the length, never fill it above halfway again. The depth of the container really is not all that important. but less water volume means more attention is needed.
@@GrowingAnswers Thank you
Please answer why the root hate light?
And also answer :
If we add an aeration into the hydroponic nutrient tank on NFT system, can the dissolved oxygen in the nutrient tank be brought up to the top of the installation pipe or this metode can only work on kratky system?
Iv'e been asking this to many people but still can't get the right answer for me.
Sorry for my English.
I can’t fully answer the roots question. However, uv light from sunlight is bad for roots and the microorganisms that are part of the symbiotic system that the roots use, can be sterilized by uv light. Roots tend to die after too much light exposure. As far as oxygen goes, yes if you aerate an reservoir external of the planted containers then it will have enough oxygen, but in that case it’s no longer defined as kratky. Kratky simply has roots partially exposed to air with no need for aerated water.
@@GrowingAnswers In my country, the NFT system uses pipes as a place for plants to be planted and for places where nutrients are mixed is in an external reservoir where we use water pumps to carry nutrients to each plant pipe.
Sorry if i have to ask you about this two times,
If we aerated the external reservoir, will the dissolved oxygen be able to be carried by the pump through the pipe so the plants can have more oxygen even if just a little oxygen?
If yes, how far the oxygen can goes?
Thank you.
@@grim8505 if water is circulating, you don’t need to aerate. Circulation is aeration.
@@GrowingAnswers Thanks, one more question,
Does provide 24 -hour grow light on the nursery will grow faster than using sunlight
@@grim8505 plants grow most in the dark. so no
Hi Ryan,I have learned a lot from you,thanks.Best!
So after some personal failures with both kratky and DWC, I realised I'm doing something terribly wrong and it raises the pH level.
And at the first video I thought I finally had an answer, that pH can raise a lot if there is intensive aeration. But now, it seems to have an opposite effect?
tonyvice6661616 it can at first, but becomes acidic from dissolved co2. It shouldn’t effect it that much though.
That was fast!Thanks! I really appreciate that you responded! Good luck on your ongoing ventures
great video, thank you. but I have a question. when you say kratky vs dwc, is the dwc a real floating raft system or a kratky with air?? thanks.
I don’t remember too much from that video, but I can tell you it was not a floating raft. I think what I did is just kept it full
@@GrowingAnswers so in your opion, is one better than the other,??
@@litano Kratky is great for simplicity and any aerated solution is going to work better or at least grow faster. True DWC in my opinion seems kind of pointless. Completely submersing the roots entirely doesn’t seem to be any better than just immersing the roots with aeration
Thanks bro, great video!
Check the spacing on your light.. of it's too close it'll burn if it's too far they plant will reach
Hello ryan, thx for sharing your experiment. By the way, why don't you add small fish like tetras in the bucket ? They could use the oxygen and you got free fertilizer for the plant
Aquaponics doesnt work that way, also i dont think a tetra can support the nutes a plant needed.
Excellent project.....A +
I wonder if starting it at a slightly high PH to start with would adjust for the depletion effect that happens with aeration over time?
Also, I noticed that your Kratky plants had more leaf curling than the aerated ones. I have Kratky going right now and notice this in my plants too. I wonder what this is exactly; a nutrient deficienc,y or some sort or sensitivity to the lights that affects the Kratky more than the aerated ones?
IAMGiftbearer I think it has something to do with calcium and either too much or not enough light. specifically I don’t know. I wasn’t paying as much attention to that because nutrient uptake wasn’t one of the main observations. There are a lot a variables when it comes to chemistry and lighting. In order to understand that, I’d have to grow a single plant and adjust the lighting first to see how it effects it. Can’t really do that while running another experiment though.
What I can say is that the less light the pepper plants have, the more crinkly the leaves get radiating outward from the center of intensity.
IAMGiftbearer I’m thinking the lead curl is a reaction to not getting water to the leaves so well - I bet the aerated one is better hydrated internally once you get further from the root
Try increasing fan blowing down on plants if you can. Somehow increase air circulation which directly enable transpiration and calcium uptake.
I have started some tomato seedlings in 3" net cups with clay pebbles. They are around 10 days old and 1 - 2 true leaves appear on them. I am doing it krtaky in small plastic jar. The roots are not coming out of the net cup. The nutrient solution is just touching the bottom of the net cup. What could be the issue and how can I fix it? Thanks.
Mayur Shah doesn't sound like there's any issues. Tomatoes take a while to get started. As long as they are still growing, I wouldn't worry.
Alright. Your words relaxed me. Thank you.
You buy local or you have specific website to get general supplies?
thetommantom both. But almost all my lights are given to me for testing.
Ключ смотрят в России тоже !! Спасибо за уроки !!
thanks its lower my bugjet. Thank you❤️❤️❤️
Cheers mate, very precise.
Your Biggest fan now, keep it up
Very interesting stuff! thanks for the video!
The commonly known DWC is not true DWC. What this so-called DWC method does is adding oxygen to a water volume similar to Kratky's since the plants are of fixed height instead of plants floating directly on top of the water in true DWC. As a result, all those oxygen bubbles create mist/water droplets that take time to runoff to the reservoir, decreasing the water content in the reservoir and maybe increasing pH? In other words, the oxygen pump only works in the beginning when the water volume is high, at the cost of creating mist and lowering pH; and when the plants have sucked up a lot more water and nutrition, the oxygen pump should become less effective since a smaller and smaller portion of the root is submerged.
Man tnk u. Love from France ❤️
Random Ryan: did you check BRIX levels in the plants?
Getting a little more scientific than this experiment is intended to be. No I didn't get to that detail, but I did taste them and they tasted the same.
Thanks Ryan; I'm new to all this and just setting up my Kratky crops BUT hey, I have my new fancy BRIX refractometer and am itchin' to use it! :-D
Terrific videos, thank you!
basil doesnt need a lot of o2 so they both met their o2 maximums. try the experiment with a fruiting plant
I did. It should be linked.
@@GrowingAnswers Ahh good show! Didn't pay attention to the description. Thanks for sharing these!
those buckets are awesome. you have a link to a purchase source?
Micah Johns you have to buy the cat litter. I don’t think you can just buy the containers.
Man, someone should make those. They look awesome especially for the size plants that you have going there.
I have a question: when you're growing in these experiments, in the tents or just in your basement or wherever else in your house, what are the temps (the high and low temps)?
Thanks.
Complex sits around 68-72
Oh really? I would've thought warmer than that, in the 75*+ range. I guess it's not very much wattage from those particular leds you're using.
Cool, thanks.
Aerating your water not only adds oxygen to your water but also carbon dioxide (CO2). When carbon dioxide dissolves in water it produces carbonic acid (H2CO3). So my guess: this weak acid lowers the pH of your water.
Survival Bert that was my guess. It's just the opposite of what I thought would happen being a fish tank keeper.
Aeration changes the ph as well. As nitrates are absorbed they leave hydrogen ions in the water as well that make the water slowly more acidic. However the plants generally like acidic water.
Which model and “wattage” Light are you using for this test?
Marlin Schrock roleadro 300w.
kratky roots breathe from the roots above water level.
the water level should be lowered to half of root length or half of bucket height which ever after the roots have grown long so that plenty of air roots grow and the plant has plenty of air and co2 which it draws thru the roots.
kratky is amazing bcuz usually water has depleted oxygen in 3 days and in 14 days it starts growing bacteria but in kratky the roots are so well aerated that it doesnt matter.
i change water once a week thou bcuz i use low ppm nutes. i dont want to give strong nutes so no burns.
Jungles Bongles both methods were allowed to drop to 50% water level. I talked more about that in part 1.
K what? Are those containers called again?
santiago vindell kitty litter. Think it’s tidy cat.
are those kitty litter buckets food grade plastic???
Do a video on fogponics pleeeease!
elliott debell planning on it.
Nice comparison! Try with strawberries
THANK YOU
Amazing videos man, I still have a question, What kind of plants do you think doesn't need aeration?? So we can grow them with the "Kratky method".
Greetings from Argentina
fech lettuce or most herbs grow well in kratky. There is no such thing as not needing aeration. It’s just that some plants grow just as well without it. All plants are going to benefit in some way from aeration. If not the plant, then the solution certainly will. Less anaerobic bacteria.
Mixing nute rule1 add silica 1st cal mag 2nd everything else after this order
Those buckets cost with lids 126.00 for an 8 gal model. CRAZY!!!
Or they are free if you buy cat litter
Ph wont stay stable in dwc unless ec/ppms are right for the plant at its stage of growth...also dependent on microbes used ;))
Top Lad!
2:27 wow a minute grew you that much beard
For 5 buckets
Nice...
You talk about the PH dropping? This does not happen as water evaporates, it goes higher. We constantly fight PH CLIMB or "PH creep", thus your results you speak of contradict the norm. It's interesting you use tap water, but you don't really know exactly what is in it, you also do not speak of nutrients in this second video, I assume you are doing same as first video. Many recommend a PH of 5.5 for incoming water changes, as PH creeps up as water evaporates (Kratky or DWC ) and so the PH can creep up to 6.5 in 1 or 2 days.
Good experiment tho.
Why guess? Take Harley Smith's classes sponsored by npk nutrients. He will explain what the 17 nutrients are and how to use them. His classes are 12 weeks online .
It was the best 100.dollars I have ever spent.