This was very helpful.. thank you!! I am raising rabbits for meat and I honestly can’t bring myself to put them down any other way Fingers crossed this will work out for me on a larger scale
Great video -- and double thank you for the shopping list. I bought the regulator from your list, but the adaptor for the hose to the regulator doesn't fit. I wonder what's different? A little more detail might be helpful, like the drill bit size?
To go from the fitting on the regulator to the hose you are gonna need a male air fitting to screw on to the fitting on the regulator that the hose will attach to. We didn’t put a drill bit size cause we measured the valve stem we used with a digital caliper and used a step bit. At 8:42 it shows the air fitting in the air hose that attached to the regulator.
Really nice video! I did just wanted to let you know you have a small math error in your flow rate calculation. It's kinda minor, but quarts aren't exactly the same as liters! Also, 30% is still the lower bound given by the AVMA, but 70% is the upper bound as of Jan 2020. Just wanted to mention that!
Thank you for the comment. I reviewed the calculations, and while you are correct that liters and quarts vary (our 18qt container is equal to 17L) the equation was set up to configure a liter flow rate of the gas per quart size. I hope that makes sense. I have reviewed the % given by the AVMA and while those are the parameters that they have given, I would never go that high in the gas concentration. From other breeders experiences, when going above 50%, you risk causing unnecessary pain to the rat. So far, we have had great success with this setup and flow rate with any size rat, except newborn to 1 week old.
@@FenderFootprints Genuinely, your video & info is overall very good! Truly one of the best guides I've seen. I don't mean to cause a fuss, someone just pointed me to this video after my lower bound calculation differed from yours, and I was curious to see why. If you want a more accurate formula, it would be either "Volume (container capacity *in liters*) X .30 (30%) = liters per minute", or "Volume (container capacity *in quarts*) X .95 (liters per quart) X .30 (30%) = liters per minute”. Also, please understand I’m not recommending anyone use the 70% displacement rate if 30% is working well. You’re absolutely correct when you say too high flow rates can lead to pain/burning. However, I think it’s important to know that too low flow rates can lead to distress/panic, and that is equally inhumane according to the AVMA. I actually saw this in my own rats when I was right at 30%. They would jump around anxiously trying to escape instead of falling unconscious quickly & peacefully. I needed to bump it up just a tad, but it really just depends on your own rodents. Here’s a quote from the AVMA explaining it better than I can: “An optimal flow rate for CO2 euthanasia systems should displace 30% to 70% of the chamber or cage volume/min, with the understanding that there is potential for increased distress due to dyspnea at lower flow rates or mucous membrane pain associated with flow rates at the high ends of this range. However, as there is no clear evidence of a flow rate that optimally minimizes both pain and distress for all species, sexes, and genetic backgrounds, veterinarians should use their professional judgment to determine which flow rate is appropriate for their circumstances.” www.avma.org/sites/default/files/2020-01/2020-Euthanasia-Final-1-17-20.pdf
Would you mind doing a video of how it all works and how you would set the CO2 tank? I soon will be ordering my supplies for my own chamber but have not found a video on how to set it or work it thanks again.
After its all together, you open the tank valve by a twist knob on top of the tank. Ours states open or close direction indicated. Then turn the twist knob on the regulator till the desired liter flow to let gas come through the hose into the bin. After the allotted time passes, twist both back to a closed/off position. I can include this in my next rat video in the new year, but I will not show the rats passing. I need to research TH-cam guidelines before showing graphic material such as this.
@@FenderFootprints thank you. I just placed my order for all parts to do mine however just fyi the link to the 18qt container does not work so now I am trying to find one thay is air tight without buying the wrong thing. Maybe you can show without rats, i know i have seen others show the whole thing on here and just made a statement about the graphics.
I will have to review the video. It’s been awhile since we did this. I’m thinking we just changed the brass connector which just threads off with some wrenches.
I love your video but got a couple questions. I have seen others who have placed a second line on the top for air to escape. 1. Does your plan need a second line placed to allow air out so it dont blow the top. 2. Is it 3 to 5 mins for all size rats? Example would be doing a rat pinkie to a XX large rat. One would think it would not take much for a pinkie over a much larger rat. Thanks. Love your videos.
Thank you and your welcome. To answer your questions...1. No 2. Pinkie rats get put straight into the freezer and usually pass within 1-2 minutes. All others are 3-5 minutes. The smaller ones usually take longer than the bigger ones to stop breathing, in my experience. Once breathing stops, I continue for about 30 seconds. Turn off the gas and then let sit for 1-2 minutes before opening the bin.
@@FenderFootprints if you throw pinkies in right away is that not painful for them? I dont want to cause any of my rats young or old any pain. What size would you start with a CO2 chamber? Thanks again.
Hello again. Had a question about your container you use. Is it airtight? If not do you do it inside your home or out? If inside what are your concerns about CO2 escaping the container and being in your home? Also if not what are your concerns about it not being airtight and still doing what it needs to do? Only reason I ask cause I have seen many videos about a CO2 chamber made and you would be the first one I hear bit using a airtight one. If it is airtight where can I find one as I am having problems locating one of that size that says its airtight. If you can get back to be soon then later that would be great as this is the only item I still need to get, all other supplies are being shipped as we speak. Thank you.
I don’t use an airtight container. You can, just drill a small hole towards the top to prevent pressure build up. We started doing it outside and then moved inside, but generally only do one round indoors. The amount of co2 used for a single round will not affect us in the area in which we do it. I would recommend doing it in the garage if not out doors. Hope this helps
Is the oxygen adapter size B female to 1/4 male necessary I've followed your list for my setup for the most part but I did get a smaller 5lb tank could I just hose clamp my airline permanently to the regulator or does the oxygen adapter reduce the flow
It is not necessary. It is just the way we did it. You can permanently affix the hose with a clamp, especially since after the flow regulator it is a low pressure.
Hey again, sorry for the trouble. But did you guys use the tape when putting on the piece to the hose? Also what was that called again for the tool used to drill the hole into the container?
Love your video great information I subbed you from London United kingdom I keep pet rat's and it's good to have a painless way when the time comes ❤❤
This was very helpful.. thank you!!
I am raising rabbits for meat and I honestly can’t bring myself to put them down any other way
Fingers crossed this will work out for me on a larger scale
Great video -- and double thank you for the shopping list. I bought the regulator from your list, but the adaptor for the hose to the regulator doesn't fit. I wonder what's different? A little more detail might be helpful, like the drill bit size?
To go from the fitting on the regulator to the hose you are gonna need a male air fitting to screw on to the fitting on the regulator that the hose will attach to. We didn’t put a drill bit size cause we measured the valve stem we used with a digital caliper and used a step bit. At 8:42 it shows the air fitting in the air hose that attached to the regulator.
What about nitrogen? If using nitrogen would it be a mix too or just straight nitrogen?
Really nice video! I did just wanted to let you know you have a small math error in your flow rate calculation. It's kinda minor, but quarts aren't exactly the same as liters! Also, 30% is still the lower bound given by the AVMA, but 70% is the upper bound as of Jan 2020. Just wanted to mention that!
Thank you for the comment. I reviewed the calculations, and while you are correct that liters and quarts vary (our 18qt container is equal to 17L) the equation was set up to configure a liter flow rate of the gas per quart size. I hope that makes sense. I have reviewed the % given by the AVMA and while those are the parameters that they have given, I would never go that high in the gas concentration. From other breeders experiences, when going above 50%, you risk causing unnecessary pain to the rat. So far, we have had great success with this setup and flow rate with any size rat, except newborn to 1 week old.
@@FenderFootprints Genuinely, your video & info is overall very good! Truly one of the best guides I've seen. I don't mean to cause a fuss, someone just pointed me to this video after my lower bound calculation differed from yours, and I was curious to see why. If you want a more accurate formula, it would be either "Volume (container capacity *in liters*) X .30 (30%) = liters per minute", or "Volume (container capacity *in quarts*) X .95 (liters per quart) X .30 (30%) = liters per minute”. Also, please understand I’m not recommending anyone use the 70% displacement rate if 30% is working well. You’re absolutely correct when you say too high flow rates can lead to pain/burning. However, I think it’s important to know that too low flow rates can lead to distress/panic, and that is equally inhumane according to the AVMA. I actually saw this in my own rats when I was right at 30%. They would jump around anxiously trying to escape instead of falling unconscious quickly & peacefully. I needed to bump it up just a tad, but it really just depends on your own rodents. Here’s a quote from the AVMA explaining it better than I can: “An optimal flow rate for CO2 euthanasia systems should displace 30% to 70% of the chamber or cage volume/min, with the understanding that there is potential for increased distress due to dyspnea at lower flow rates or mucous membrane pain associated with flow rates at the high ends of this range. However, as there is no clear evidence of a flow rate that optimally minimizes both pain and distress for all species, sexes, and genetic backgrounds, veterinarians should use their professional judgment to determine which flow rate is appropriate for their circumstances.” www.avma.org/sites/default/files/2020-01/2020-Euthanasia-Final-1-17-20.pdf
Would you mind doing a video of how it all works and how you would set the CO2 tank? I soon will be ordering my supplies for my own chamber but have not found a video on how to set it or work it thanks again.
After its all together, you open the tank valve by a twist knob on top of the tank. Ours states open or close direction indicated. Then turn the twist knob on the regulator till the desired liter flow to let gas come through the hose into the bin. After the allotted time passes, twist both back to a closed/off position. I can include this in my next rat video in the new year, but I will not show the rats passing. I need to research TH-cam guidelines before showing graphic material such as this.
@@FenderFootprints thank you. I just placed my order for all parts to do mine however just fyi the link to the 18qt container does not work so now I am trying to find one thay is air tight without buying the wrong thing. Maybe you can show without rats, i know i have seen others show the whole thing on here and just made a statement about the graphics.
I cannot get the original connector off the hose due to black rubber, how did you manage to get it off so easily?
I will have to review the video. It’s been awhile since we did this. I’m thinking we just changed the brass connector which just threads off with some wrenches.
Why is there not an oxygen exit hole again? Sorry I feel like I missed the reason..
The top of the bin latches but does not have a gasket. The small space between the top and bottom allows just enough room for oxygen to be pushed out.
I love your video but got a couple questions. I have seen others who have placed a second line on the top for air to escape. 1. Does your plan need a second line placed to allow air out so it dont blow the top. 2. Is it 3 to 5 mins for all size rats? Example would be doing a rat pinkie to a XX large rat. One would think it would not take much for a pinkie over a much larger rat. Thanks. Love your videos.
Thank you and your welcome. To answer your questions...1. No 2. Pinkie rats get put straight into the freezer and usually pass within 1-2 minutes. All others are 3-5 minutes. The smaller ones usually take longer than the bigger ones to stop breathing, in my experience. Once breathing stops, I continue for about 30 seconds. Turn off the gas and then let sit for 1-2 minutes before opening the bin.
@@FenderFootprints if you throw pinkies in right away is that not painful for them? I dont want to cause any of my rats young or old any pain. What size would you start with a CO2 chamber? Thanks again.
Hello again. Had a question about your container you use. Is it airtight? If not do you do it inside your home or out? If inside what are your concerns about CO2 escaping the container and being in your home? Also if not what are your concerns about it not being airtight and still doing what it needs to do? Only reason I ask cause I have seen many videos about a CO2 chamber made and you would be the first one I hear bit using a airtight one. If it is airtight where can I find one as I am having problems locating one of that size that says its airtight. If you can get back to be soon then later that would be great as this is the only item I still need to get, all other supplies are being shipped as we speak. Thank you.
I don’t use an airtight container. You can, just drill a small hole towards the top to prevent pressure build up. We started doing it outside and then moved inside, but generally only do one round indoors. The amount of co2 used for a single round will not affect us in the area in which we do it. I would recommend doing it in the garage if not out doors. Hope this helps
@@FenderFootprints thank you again.
How much leakage do you get from air type connections?
None or little that we know of. I always do it in a well ventilated area.
Is the oxygen adapter size B female to 1/4 male necessary I've followed your list for my setup for the most part but I did get a smaller 5lb tank could I just hose clamp my airline permanently to the regulator or does the oxygen adapter reduce the flow
It is not necessary. It is just the way we did it. You can permanently affix the hose with a clamp, especially since after the flow regulator it is a low pressure.
Did you cut off the quick connector part of the gas hose?
Hey again, sorry for the trouble. But did you guys use the tape when putting on the piece to the hose? Also what was that called again for the tool used to drill the hole into the container?
Teflon tape needs to go on the threads of the air fittings. And we used a step bit for drilling the hole.
Do not use Teflon tape on machine services, such as the nut from the regulator to the tank.
@@FenderFootprints yes that does help and thank you so much.
@@FenderFootprints do you also use the tape when putting on the male to female adaptor?
I’ve seen some people have another tube on the opposite side going into a cup of water, is that necessary?
Not for our setup.
@@FenderFootprints another question, what size step bit, and what size did you make the hole in the tub?
This lady talk the same way ProfessorHero does, must be something on the water.