I'm missing something here. Can you give the brand/model of the filters you're looking at? IMO
, the best HOB
(hang on back) filters for freshwater are the Emperor 280 and 400. They are easy to maintain, do a good job, and are unbelieveably dependable. They also have media containers so you can run activated carbon, synthetic resin, ect... in addition to the filter cartridge. If you prefer the hang on canister, look at the HOT Magnum. Be sure to use it with a bio wheel if you go that route because this filter doesn't have good bio capacity by itself. The Whisper HOB
filters are good also, but IMO
, a distant second to the Emperors. What size tank do you have?