This is the first year i had to open an above ground pool. I am seeing a cloudy substance on the bottom of my pool after pump has been off for a couple hours. I put vacuum in and my whole pool gets so cloudy i cant see second step of ladder and seeing blue slimy(simliar to downy) in my filter. Please help i had spent so much money trying to fix this and nothing works…all my chemical levels are good. Thanks in advance.