Canister return above or below the surface ?

Felix T Cat · Dec 28, 2008

Right now I have the filter return above the surface of the water which I believe is injecting a large amount of air into the water. Problem is that all of my flake food floats in that direction and then gets forced down to the bottom of the tank.

Should the canister filter return be above or below the surface. ? Pros / Cons to either ?

Hooked Newbie · Dec 28, 2008

Below. You've already pointed out why.

rich311k · Dec 28, 2008

Mine are all below.

jm1212 · Dec 28, 2008

below...its precisely the reason that canisters are favored over HOB filters for planted tanks. with the intake below, there is much less gas exchange and therefore more CO2 for the plants to use

jpappy789 · Dec 29, 2008

Yep, below.

Felix T Cat · Dec 29, 2008

jm1212 said:
below...its precisely the reason that canisters are favored over HOB filters for planted tanks. with the intake below, there is much less gas exchange and therefore more CO2 for the plants to use

But since I have no live plants wouldn't that create high CO2 levels for the fish ?.

Rbishop · Dec 29, 2008

Are you injecting CO2? If not, dn't worry about it. I keep mine below and pointed up to ripple the surface.

Ryanstech · Dec 29, 2008

keep it below the surface but that probably won't solve your sinking flake food problem completely. I'd suggest turning your filter off temporarily while you feed, makes it a lot easier IMO.

Felix T Cat · Dec 29, 2008

Not injecting CO2, the under pointed to the surface sounds like a good placement to me though

yourchoice · Dec 29, 2008

Above and being the only filter might give deadspots of no flow in the lower regions.

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Canister return above or below the surface ?

Felix T Cat

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Hooked Newbie

Today will be yesterday tomorrow

rich311k

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jm1212

Pterophyllum scalare

jpappy789

Plants need meat too

Felix T Cat

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Rbishop

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Ryanstech

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Felix T Cat

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yourchoice

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