thanks wolf.
one thing though...i just ordered ANOTHER whisper in-tank 40i...
since i thought i broke the filter since i had it out of the water when it was still plugged in.
so i'm thinking of putting the current filter cartidges from the 40i to the new 40i filter.. would that be o.k.?
i'll probably sell 2 filters and i'll buy a sponge filter at a local fish store. thanks!
and for the sponge filters, are they going to be on the tank bottom?