We inherited a pool when we purchased our current house. I'm slowly learning this stuff and everytime I think I can take a breath something goes wrong. I guess it keeps me honest and on my toes.
I noticed recently that DE would leak back into the pool when the pump turns on. It would only do it for about two seconds and then it would stop leaking DE and filters normally as far as I can tell. So I decided to go ahead and take apart the filter and clean it. Then I placed fresh DE into the system. Even after doing this it still leaks DE into the pool for the first two seconds. If I "bump" the filter it will leak for about four seconds instead of two. I figured one of the "fingers" might be damaged but if this was the case wouldn't it leak DE into the pool constantly?