This is my first canister filter. Its a Penn and Plax cascade 1200. It has 3 media trays, and is going to filter a 50 gallon oceanic. It looks like it gets pumped down and comes up through the three trays, correct? Ive searched google and some of the threads the filter media sticky is a little much to try to read through. So my main question, is whats the best set up for this filter? I have a biopad cut to two layers in the bottom tray, carbon in a filter bag in the middle tray, and the top try filled with Biomax. I know the carbon is ok in the middle, should the biomax be on the top or bottom? Or is there a better way to go about it?