DIY cannister filter - Page 4 - Aquarium Advice

mr funktastic · 10-18-2006, 10:00 PM

well i tried it out today but the bottom fitting didnt seem to want to hold lol. the top one i put in was fine but the bottom one didnt seal. so i got a bit of water on the floor. it seemd to push the water down and back up well considering there was a leak. i will redo the bottom fitting aith a stronger silicone and try again. the fitting i used are the right size for the hose and they fit well. but i just need a better deal between the container and them. maybe an epoxy rather than silicone. silicone doesnt bond well to plastic, even though i scratched it all up to give the silicone something to grab to.

**Purrbox** · 10-18-2006, 11:05 PM

I'd recommend trying some Goop. It works great for affixing plastic airline fittings to PVC for DIY CO2 Reactors, should work just as well for what your doing. No problems with the tank inhabitants after it's cured properly either.

trotty · 10-19-2006, 01:17 AM

24 hour per mm of silcone is the best rule of thumb when it comes to curing........

Thats why you shouldnt fill a new tank for 2-3 weeks after manufacture. It was an agonising wait when i got my 240 gal. But gave me plenty of time to stain the stand! LOL

physicsdude · 11-27-2006, 10:15 AM

This is a great thread. These ideas are like what I came up with too! One question though, do you run the pump inside the filter or outside.

mr funktastic · 11-27-2006, 11:27 AM

i ran mine in the aquarium. my powerhead i used didnt give me enought flow and i was to cheap to buy a better powerhead so i am not running the cannister. in the future when i have some spare cash i will do this again but on a larger scale.

andywg · 11-27-2006, 12:32 PM

The main problem with an effective cannister filter is preventing media bypass. You want all the water to flow through each stage of filtration rather than slip past the outside of it all. This is why DIY tends not to be used on larger setups.

10-18-2006, 11:05 PM	#32
Purrbox Aquarium Advice Addict Community Moderator Join Date: Jun 2005 Location: Iowa USA Posts: 5,259	I'd recommend trying some Goop. It works great for affixing plastic airline fittings to PVC for DIY CO2 Reactors, should work just as well for what your doing. No problems with the tank inhabitants after it's cured properly either. __________________ ~Joy 10 Gallon Planted Photo Log - 5.5 Gallon Planted Photo Log - 2.5 Gallon Planted Photo Log - Pico Planted Photo Log

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10-18-2006, 10:00 PM	#31
mr funktastic Aquarium Advice Addict Join Date: Jun 2005 Location: alliston, ON Posts: 2,220 Images: 17	well i tried it out today but the bottom fitting didnt seem to want to hold lol. the top one i put in was fine but the bottom one didnt seal. so i got a bit of water on the floor. it seemd to push the water down and back up well considering there was a leak. i will redo the bottom fitting aith a stronger silicone and try again. the fitting i used are the right size for the hose and they fit well. but i just need a better deal between the container and them. maybe an epoxy rather than silicone. silicone doesnt bond well to plastic, even though i scratched it all up to give the silicone something to grab to.

10-19-2006, 01:17 AM	#33
trotty Aquarium Advice Freak Join Date: Dec 2005 Location: sydney Australia Posts: 356 Images: 31	24 hour per mm of silcone is the best rule of thumb when it comes to curing........ Thats why you shouldnt fill a new tank for 2-3 weeks after manufacture. It was an agonising wait when i got my 240 gal. But gave me plenty of time to stain the stand! LOL

11-27-2006, 10:15 AM	#34
physicsdude Aquarium Advice Freak Join Date: Feb 2005 Location: New York State Posts: 363 Images: 1	This is a great thread. These ideas are like what I came up with too! One question though, do you run the pump inside the filter or outside.

11-27-2006, 11:27 AM	#35
mr funktastic Aquarium Advice Addict Join Date: Jun 2005 Location: alliston, ON Posts: 2,220 Images: 17	i ran mine in the aquarium. my powerhead i used didnt give me enought flow and i was to cheap to buy a better powerhead so i am not running the cannister. in the future when i have some spare cash i will do this again but on a larger scale.

11-27-2006, 12:32 PM	#36
andywg Aquarium Advice Regular Join Date: May 2005 Location: Southend, Essex, UK Posts: 77	The main problem with an effective cannister filter is preventing media bypass. You want all the water to flow through each stage of filtration rather than slip past the outside of it all. This is why DIY tends not to be used on larger setups.