08-28-2011, 06:46 PM
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Originally Posted by Inga
Well, I have 2 more sponge filters all ready to go. Maybe when they are worn out, I will think about getting a canister. It sounds like a great deal if it is nice and quiet and works well and is good for planted tanks. What else could a clean freak ask for, right? Is the outflow strong enough that it moves around the gravel?
I guess it could be if you pointed it toward the gravel but, no, in general you want it pointed toward the back of the tank or toward the surface to keep the surface water moving so it doesn't get stagnant.
Plus if you had it pointed toward the gravel, it could do a number on your plants.