05-03-2009, 08:46 AM
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Originally Posted by wake49
Actually, I ran a canister filter empty for a few months before I incorporated my sump. It never trapped anything, because there was no filter media in it. It was a good way to turn over the water, and before the sump, added another output (acting like a powerhead).
And I did suggest installing a sump (and not using a filter), but I believe the OP said that a sump wasn't possible at this time.
The only downside with this idea is that you won't actually be removing the surface film from the water, but just skimming it off the surface and reintroducing these organic proteins back into the aquarium (as it exits the canister).
On the up side, eliminating this surface film will increase light penetration. Also, removing it from the surface will get it back into the water and allow for possible removal by a hang on skimmer.