Right now i have a 35G with a single AC70 and a 125 g with two fluval 304s and a single rena xp2.. i was wondering if it would beneficial to switch one of the fluval 304s to the 35 and put the AC70 on the 125? what do you guys think?
Can't answer your filter question, but if you're worried about aeration, you could get a nice cheap whisper air pump (I just use the 40 model on my 125g). It was $9 and is plenty powerful and quieter than the last air pump I had.