I think canister filters are often a matter of preference--which ones are easier to prime and open/close. When I was researching canisters, I remember rena filstars were recommended as being good for their price--plus they have a wonderful set-up video on youtube. I purchased a Penn Plax Cascade 1000 because of price and the priming button. I liked it so well I purchased another! In setting up a 125 gallon I acquired 2 Fluval 405's and have as yet not been able to get them primed, etc. I have broken two of the parts over the impeller just cleaning it and one clamp. But other people have no problem with them. Many people here also recommend the Eihem,,,Have fun making your choice. Compare features and gph.