Picked up a used filter/pump setup. The pump appears to be the same (1hp) power as my old pump. The sand/filter container is significantly smaller. If I am doing my research, images only, label worn off. The new filter requires 1oolbs sand compared to what I think was 250lbs. The flange on the old sand tank is larger and will not accommodate the new filter head. The newer setup appears to be this. Pentair PNSD0035DE2160 Sand Dollar Aboveground Filter System with Blow-Molded Tank, 1 HP

Per my last post, I am sticking with sand. There appears to be several choices of sand types and size. Is there a good, better best choice in that regard??

can slightly more sand in a given filter effect performance? or any other things I should consider?