With the Marineland I can only speak for the 530, It is a massive filter. The trays are very big....you gave to be very careful to put it togethor properly with these gaskets between the trays to avoid bypass. It does need to be blled of air in the head every once in a while by slighly tipping the canister in each direction as air gets trapped up in the head over time. It moves water even with media, I get rid of the Bio Balls it comes with and get Biomax or matrix. The input output pieces suck the hose in fine but the rest leaves allot to be desired. You save money by getting the Sun Sun or Aquatop as it's the same filter with slight changes. Marineland service is just awsome. I have two of these