Tropical Fish Keeping - Aquarium fish care and resources

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esteenson88 12-19-2008 05:02 PM

undergravel cannister
I'm considering connecting either my intake or my output from my Fluval 204 cannister to a single uplift tube of my undergravel filter. Does anyone see any problems with this? Any recommendations on whether I should connect it to the intake or output? The reason I'm doing this is to get maximum filtration, with minimum water current.
Thanks for your help,

catfishtabbi 12-19-2008 06:04 PM

really sounds like you would want to pull water from UNDER your UGF. if you put water back into the tank from underneath you would be blowing all kinds of sediment up into your tank. its filthy under there. i once had a 5g hex spotted puffer tank and when i cleaned it there would be lots of red worms (food that got away)
under there. good luck sounds doable and it'll keep it clean down there.

SinCrisis 12-20-2008 12:50 PM

whoa, never thought of that. If you connect the intake to one side and output to the other u might be able to create an under gravel current that would keep ur UGF clean.

iamntbatman 12-21-2008 08:42 PM

I don't see why it wouldn't work. Plumbing might be kind of a pain, and it might put some extra stress on the canister motor, but those are the only problems I can think of.

If it were me, I'd put the output on the UGF. This would make your UGF function like a reverse-flow UGF, which keeps debris from clogging the UGF plate and your gravel. More water flow through the gravel, better biological filtration, and less stuff to vac up with the gravel vac during water changes.

Tyyrlym 12-23-2008 08:44 AM

Actually if you connect both the outlet and inlet to the UGF you're not going to accomplish anything. Water will take the path of least resistance, which means water pumped under the UGF will head directly for the intake and back to the canister. You'll have little flow in the tank itself. You'd be better off, if you wanna do this, connecting the outlet to the UGF and running a reverse flow set up. This will help keep the detrius out of the gravel and in the water coloum where the filter can remove it. A reverse flow set up cures most of the UGF's ills. On a new system this will work just fine. On an existing set up I'd clean the are under the plates first.

esteenson88 12-26-2008 12:58 AM

awesome. thanks alot, guys. i love this forum

Tyyrlym 12-29-2008 01:43 PM

I should have written it a little clearer. Attach the outlet to the UGF and keep the intake above it in the tank. Do not connect the intake to the UGF.

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