I am thinking about replacing my sand filter this year finally. Was all but set on going cartridge, but now I am really looking hard at DE. I think I really need the fine filtration here with the pollens that get in my water and get through the sand. Anyway...I have seen quite a few posts and praises on the Pentair De quad. Looks like the one to get. Question is, will one of these be OK in an above ground system? I have a 3/4hp 2 speed pump and a 24ft round pool. I was thinking the Quad 60?