My Hayward Perflex EC65 sends a temporary plume of dirty DE media into the pool thru the eyeball return jets after the 1.5 HP pump has been off for a while. I removed and inspected the rubber gasket and every grid finger and found no damage / tears / holes / cracks. Same for the grid plates, bump shaft o-rings. I even tried replacing the tank check valve. Maybe I should try the fiber type of media instead of DE powder?