I know this has been asked before but I'm wondering about others' experiences with different filters. I've got a 50 gal tank with a Fluval 4plus that's just not doing it's job anymore. I have to do 80% water changes every 1 or 2 weeks and it's driving me nuts. I know little about what kinds are out there, but I'm guessing a cannister filter would be best. I'm looking to buy one next week. My next tank upgrade will be at least a 125 gallon so I'm looking for something that will handle that. The best I could find at the local stores is a Fluval 404 or something similar but it says on the box that it's only rated for 75 gallons?
any input is appreciated.


