Originally posted by NickH
For tanks over 50 gallons, canisters are a good solution. HOB's are convenient, but are not very efficient and have to be cleaned often. Good canisters are set and forget. The canister will cost you more up front, but will pay for itself by lasting longer with longer maintenaince intervals. I have a Hydor Prime 30 canister (now Proquatics 2400 at Petsmart). I would say comparable to the older Eheims...