I'm comparing two canister filters and they both have an out put of 500 gph. The first one is under $200 and its rated for tanks up to a 150 gallon tank and the second on its well over $300, but its rated for a 400 gallon tank.
Can someone explain why the more expensive one can filter a bigger tank with the same output as the cheaper one?
Thanks
Can someone explain why the more expensive one can filter a bigger tank with the same output as the cheaper one?
Thanks