Still somewhat new to pools and this year I decided to open my pool myself, instead of hiring Leslie's, as I have done in the past. Everything hooked up fine, without any leaks and everything seems to work, with the exception of my filter. When the filter is in use, it seems that water doesn't pass through it. The pressure valve goes down to zero and there is no flow. There is, however, a strong flow if I bypass the filter and just recirculate the water.
When I opened the pool I added about 4lbs of DE to one of the skimmers. I was experiencing this issue so I backwashed (thinking maybe there was something wrong with my pump) and have not added DE again at this point. Is there something I should do to the filter? Maybe disconnect it and open it up and see what's going on inside or this not necessary?
Any help on this is greatly appreciated!!