I have a Hayward DE filter. When the pump goes off I can hear water leaving the filter. When I start it up again there is quite a bit of air blown into the pool before water fills up the filter and am back to "normal". This morning I took the strainer basket top off and saw water coming from the filter and back through the strainer toward the pool with the water in the basket being "DE cloudy". Thoughts ? Multiport - spider gasket ?