mrziggz wrote:
This is something I have wondered myself. ...but why are canister filters better? better flow? less eneregy usage? filter replacement and efficiency?
your right on a few counts. canisters are a better choice on larger tanks because they can hold more media than a hob. since they hold more media they dont have to have the water flow that is required by an hob and therefore become more efficient and use less energy. the same principle applies to the differences between sumps and canisters.
basically it come down to the application of the filter that will determine which system is best.