What causes back pressure on the filter? I just cleaned the filter including the filter cartridges. The skimmer basket is clean as well as the trap at the pump. When the pool pump turns off at night, the skimmer basket and cover get blown right off. The next morning, I go out and the cover is off and the basket is half way out of the skimmer, cocked to one side; anything in the basket is back in the pool. I'm presuming a blast of air is doing this but don't know where it's coming from or how. If I'm using the MX8, it detaches in the skimmer. When the pump is running, the gauge on the filter unit says it's running at 15psi. Any suggestions? I believe this only started about a week ago.
If it's not one thing, it's another! Thanks!