I came searching for help and I figured out what was wrong with mine. It was also human error. Today was the first time I cleaned my HW-304b (bought it a few months ago) and 3 or 4 minutes later I had a LOT of water running through the floor. I was pretty sure the filter was well shut, so I placed some kitchen paper all around the filter to see where it was leaking. After a pre-nervous-breakdown, I noticed it was a matter of millimeters! I removed 6 or 7 ceramic pieces, 4 or 5 plastic bioballs and pressed down firmly and the filter became completely sealed. I also took off the UV light after watching your video and reading the searches on Google. It's been 18 minutes and no water leaks. Thank you very much for this video. Regards from Portugal!
So happy I came by this video. I was “this” close to tossing my Sunsun, it was sucking in air and leaking about a gallon an hour. I thought I had tried everything but something you said made me realise that one of my trays was probably off kilter. I did have to apply extra pressure to close the top, so even though it seemed like I had a proper seal, there was a gap.
My tips for avoiding leaks: (1) use a pre filter which I clean weekly. I only open filter 2 or 3 times a year for cleaning, maintenance and servicing. (2) have replacement O rings on hand. I order them on eBay from international sellers which are much cheaper than UK suppliers. (3) have plumber PTFE tape handy. It is cheap and effective for remedial seals. (4) check for leaks every few hours over 24 hours after reassembly. (5) Ditch UV light. They certainly work at weakening filter trays and filling with water, not convinced of any benefit to the water. I do love Oase bio therm filters and am committed to replacing my SunSun filters with them when they die. And that's my problem- my 2x Sunsun filters won't die quickly and have been running for 5 years on my 350 litre/ 92 US gallon tank.
When you say “use a pre filter” are you talking about something on the intake hose or an actual external canister between the intake and your active filter? Thank you
I have a 304B. Great filter Can't beat the price. I have had my UV bulb running for almost two years with no damage to the trays so far. I'm sure the bulb isn't effective any more. I keep meaning to buy a new one but I never do.
Hi, Very recently I bought Sunsun HW 304-B canister filter. I found the UV light is not working continuously and always blinking from the beginning. Is this normal or it has to lighting continuously without blinking.
My exact same filter leaked. It was the plastic on top of the O ring. I love them though. I have 3 running and have only had that 1 leak. Which I found quickly tha k God and was able to fix it.
Just a tip. I recently started running all 3 with the SunSun HW 603 pre filters and they work so much better now. I clean the little pre-filters weekly (it's quick and easy) and I only have to clean the actual filter every 6 months now.
Dan, for years I wondered what causes noisy filters. It's two things: 1) The impeller needs to be replaced 2) The impeller shaft needs to be replaced. The shafts can be DIYed by measuring the diameter and length with a caliper and cutting equal width 316 steel rod to size. In addition, bushings should be lubricated with silicone oil with a viscosity of 1000cst (I think you can use up to 5000cst, but it should not be less than 1000cst - this has to do with avoiding emulsification with the water). Gaskets or seals should also be lubricated with this oil, but I am under the impression that this only applies to rubber ones and not silicone ones. The silicone ones are red in color I think. Thanks, liked.
I've used a food grade grease on all things Sealant - Beit rubber or silicone and have never had a problem with the seals. I'd however STRONGLY suggest against using vasoline (petroleum jelly) as it will deteriorate your rubber seals quickly.
@@willparsons32 "food grade grease" is somewhat ambiguous... I assume it's oil-based? Not to nit pick but you want something that doesn't react with rubber, hence the silicone-based grease.
Like my boss told me at the lfs I work at if putting UV tubes inside canister filters was such a great idea Fluval and others would be doing it in earnest. We both watched this video btw and he had some choice words while watching it.LOL
Hi, i have a question, i had a problem with my sunsun with leaking and dont start, how can i fix or check if the impeller or something else is broken? Thanks
Need ur help.. My sun sun 304-b starts leaking after some over. Even i switch off. Only solution is to open head and re install it but it againa start leaking... Its some kind of pressure or fault unable to understand...
I broke my uv housing the first day i got it. I almost threw it out my window it will not close after i put the uv bulb. Im kind mad i waited so long to get it just to break it now i have to wait another week or so.
How do you turn off the uv light? My switch has a cover on top that dosen't come off, or atleast I dont think it does, and i don't want to force it lol
The sun sun I had leaked immediately straight out of the box brand new. I took it back and got my money back. Never again. I bit the bullet and got a $400 Fluval FX6. Never had any issues. Those SunSuns are literally straight garbage. You didn’t get a canister filter worst than a SunSun I promise you with all the problems they have.
If their UV light isn't supposed to be used 24/7, then why don't they have that light programable to come one an hour or 12 a day and then turn off for another adjustable amount of time? I call that bad engineering on their part. And like you didn't know that at first, and they didn't mention it in their instructions ( I assume bcause you've never mention it in their instructions and your reading of them) If current LED lighing can be set up on builting in timers, color adjusters, thunder storm simulations, this company cannot do the same for a simple UV light so you can program when you want it on and off for a day or week's time.
I don't think so that UV can cause of that leak. UV is supposed to run 24/7 with no problem at all unless sunsun filter is a bad design and not capable of having UV at all. Shame on them.
@@MrMavhen The UV didn't cause the leak but UV light can destroy plastic. How do you think plastics get damaged out in the sun all day long? The UV light in sunshine. The UV from these bulbs will be more intense so they can damage the plastic surrounding them relatively quickly.
![How a Water Damage DISASTER was PREVENTED [and How *A Canister Filter LEAK GOT FIXED!*]](http://i.ytimg.com/vi/uTSOy0-HwVo/mqdefault.jpg)
![How a Water Damage DISASTER was PREVENTED [and How *A Canister Filter LEAK GOT FIXED!*]](/img/tr.png)
![F.HERO Ft. JSPKK x ลำไย ไหทองคำ x M-PEE - ไม่สนิทบิดหมด (Thai Riders Anthem) [Official MV]](http://i.ytimg.com/vi/kPJZ0UihBfk/mqdefault.jpg)
I came searching for help and I figured out what was wrong with mine. It was also human error. Today was the first time I cleaned my HW-304b (bought it a few months ago) and 3 or 4 minutes later I had a LOT of water running through the floor. I was pretty sure the filter was well shut, so I placed some kitchen paper all around the filter to see where it was leaking. After a pre-nervous-breakdown, I noticed it was a matter of millimeters! I removed 6 or 7 ceramic pieces, 4 or 5 plastic bioballs and pressed down firmly and the filter became completely sealed. I also took off the UV light after watching your video and reading the searches on Google. It's been 18 minutes and no water leaks. Thank you very much for this video. Regards from Portugal!
So happy I came by this video. I was “this” close to tossing my Sunsun, it was sucking in air and leaking about a gallon an hour. I thought I had tried everything but something you said made me realise that one of my trays was probably off kilter. I did have to apply extra pressure to close the top, so even though it seemed like I had a proper seal, there was a gap.
My tips for avoiding leaks:
(1) use a pre filter which I clean weekly. I only open filter 2 or 3 times a year for cleaning, maintenance and servicing.
(2) have replacement O rings on hand. I order them on eBay from international sellers which are much cheaper than UK suppliers.
(3) have plumber PTFE tape handy. It is cheap and effective for remedial seals.
(4) check for leaks every few hours over 24 hours after reassembly.
(5) Ditch UV light. They certainly work at weakening filter trays and filling with water, not convinced of any benefit to the water.
I do love Oase bio therm filters and am committed to replacing my SunSun filters with them when they die. And that's my problem- my 2x Sunsun filters won't die quickly and have been running for 5 years on my 350 litre/ 92 US gallon tank.
When you say “use a pre filter” are you talking about something on the intake hose or an actual external canister between the intake and your active filter? Thank you
I have a 304B. Great filter Can't beat the price. I have had my UV bulb running for almost two years with no damage to the trays so far. I'm sure the bulb isn't effective any more. I keep meaning to buy a new one but I never do.
Maybe they use different plastic now?
Dan Hiteshew Could be I don’t know
Hi, Very recently I bought Sunsun HW 304-B canister filter. I found the UV light is not working continuously and always blinking from the beginning.
Is this normal or it has to lighting continuously without blinking.
My exact same filter leaked. It was the plastic on top of the O ring. I love them though. I have 3 running and have only had that 1 leak. Which I found quickly tha k God and was able to fix it.
Just a tip. I recently started running all 3 with the SunSun HW 603 pre filters and they work so much better now. I clean the little pre-filters weekly (it's quick and easy) and I only have to clean the actual filter every 6 months now.
I have 4 Sunsun filters , 2 with Sunsun prefilter canisters and LOVE them !
If you had one that leaked, you'd hate them.
Dan, for years I wondered what causes noisy filters. It's two things:
1) The impeller needs to be replaced
2) The impeller shaft needs to be replaced. The shafts can be DIYed by measuring the diameter and length with a caliper and cutting equal width 316 steel rod to size.
In addition, bushings should be lubricated with silicone oil with a viscosity of 1000cst (I think you can use up to 5000cst, but it should not be less than 1000cst - this has to do with avoiding emulsification with the water).
Gaskets or seals should also be lubricated with this oil, but I am under the impression that this only applies to rubber ones and not silicone ones. The silicone ones are red in color I think.
Thanks, liked.
I've used a food grade grease on all things Sealant - Beit rubber or silicone and have never had a problem with the seals. I'd however STRONGLY suggest against using vasoline (petroleum jelly) as it will deteriorate your rubber seals quickly.
@@willparsons32 "food grade grease" is somewhat ambiguous... I assume it's oil-based? Not to nit pick but you want something that doesn't react with rubber, hence the silicone-based grease.
Like my boss told me at the lfs I work at if putting UV tubes inside canister filters was such a great idea Fluval and others would be doing it in earnest. We both watched this video btw and he had some choice words while watching it.LOL
Yeah, I haven't used the UV in years. One of my SunSun filters doesn't even have a bulb in it anymore. Lol
Lol sounds like me I get frustrated and just use pressure force lunches and kicks to get my things to work, but it works lol
Hi, i have a question, i had a problem with my sunsun with leaking and dont start, how can i fix or check if the impeller or something else is broken? Thanks
Clean the seal on the top, and prefill it before trying to restart it. You may have to pump the primer quite a bit to get it going.
Need ur help.. My sun sun 304-b starts leaking after some over. Even i switch off. Only solution is to open head and re install it but it againa start leaking...
Its some kind of pressure or fault unable to understand...
Try cleaning around the seal (O-ring)
I broke my uv housing the first day i got it. I almost threw it out my window it will not close after i put the uv bulb. Im kind mad i waited so long to get it just to break it now i have to wait another week or so.
How do you turn off the uv light? My switch has a cover on top that dosen't come off, or atleast I dont think it does, and i don't want to force it lol
The cover comes off. You just have to pry it up and wiggle it a little bit.
Got it off thanks!
@@emendozaification Nice!
What happened to your swollen particle board aquarium stand?
What do you mean? Are you asking if it collapsed? No, it's fine.
I get the old one
You cannot buy spare parts?
It's not worth it. Three replacement trays (I'd need 4) cost more than half the price of a new filter with added biomateria and carbon.
Get a rotary sander and smooth down the ends of the tubes you added.
My LID will not close please help!!
The sun sun I had leaked immediately straight out of the box brand new. I took it back and got my money back. Never again. I bit the bullet and got a $400 Fluval FX6. Never had any issues. Those SunSuns are literally straight garbage. You didn’t get a canister filter worst than a SunSun I promise you with all the problems they have.
Vasaline on seals and impeller shaft will slow/stop deterioration. 😉
Vaseline is petrolium....it will damage the seal eventually. You can buy an inert silicon oil to seal it
@@bennycallinan3617 Petroleum jelly (a slight smear) and perfectly harmless.
If their UV light isn't supposed to be used 24/7, then why don't they have that light programable to come one an hour or 12 a day and then turn off for another adjustable amount of time? I call that bad engineering on their part. And like you didn't know that at first, and they didn't mention it in their instructions ( I assume bcause you've never mention it in their instructions and your reading of them) If current LED lighing can be set up on builting in timers, color adjusters, thunder storm simulations, this company cannot do the same for a simple UV light so you can program when you want it on and off for a day or week's time.
I don't think so that UV can cause of that leak. UV is supposed to run 24/7 with no problem at all unless sunsun filter is a bad design and not capable of having UV at all. Shame on them.
I'm sure they could add all sorts of stuff, but then it wouldn't be an affordable filter anymore.
@@MrMavhen The UV didn't cause the leak but UV light can destroy plastic. How do you think plastics get damaged out in the sun all day long? The UV light in sunshine. The UV from these bulbs will be more intense so they can damage the plastic surrounding them relatively quickly.
@@captainwin6333 sunsun fan/user be like, lol
Pup314...that upgrade is on the hw3000. I m saving up my pennies 4 now. I love my 704 & 304.
With all that being said the filter is crap... thank God I keep my filters in a plastic bin for water emergencies.
I love my sunsun filters.
its not a practical solutions...
Just buy a impeller.
hi, i had a problem with my sunsun with leaking and dont start, how can i fix or check if the impeller or something else is broken? Thanks