Hello all. Right now I've got a Whisper 10i for a 10 gallon tank. It only filters the waste from my RES, right now it's shell is only about 1 and 3/4 inches long. The filter isn't doing a very good job of picking everything.
My question is, what filter should I get for him now to properly cycle the water? I've heard I should get a filter that should power 3-4 times what I have. So maybe a 30-40 gal filter for my 10 gal tank? Opinions are appreciated, thank you.

