I agree; just one isn't enough. It depends on the fish you keep though. Most likely, you will need more filtration than just that. Like the previous poster said, an FX5 would be a great choice. An eheim 2260 is another large canister, or you could go with smaller ones such as Rena XP3/4, more fluval 405's, or eheims. Emperor 400 or AC110 is the two most popular HOBs I think.