Marineland Magniflow Canister FilterThe revolutionary design of the new Marineland Magniflow Canister filter forces water to pass through the filter media trays and not around them. With virtually no bypass and a three stage filtration process, only sparkling clean water can recirculate into your tank regardless of size or type of aquarium. The key to this process is our special internal design and three stage approach that passes the water through a series of specialized filter media.