Quote Originally Posted by Rangeball
Does it have a multi-port valve? You shouldn't be getting any flow back from your filter to your skimmer, flow should only be from skimmer to filter.

Perhaps your valve is going bad, but I'm having a hard time imagining this scenario. Is it coming from your skimmer, or return?
I THINK the filter is a DE type but I need to check this. The white cloudy stuff is coming out of the skimmer and not the return, no question about that.