Hi everyone, I need to get a new filter for my tank. I have a 40 gallon bow corner tank that I've had forever seems like, and the filter I have in there is pretty old. I've always had Whisper filters, or Aqueon filters. I was wondering what you guys thought about canister type filters. Which one do you think is better, easiest to maintain etc. my tank is not real wide but it's deep, and I think that might make it a little harder on the filter? (I honestly don't know, trying to sound intelligent. LOL!) Any suggestions? Thanks!