TheGoose - I noticed that...I had shut it off for a few minutes and when I turned it back on the pressure went down but after 15 minutes or so it was back up again. I've since backwashed and this time only added 2-3 cups of DE. Next time I'll add slowly and wait until pressure stabilizes before adding more to get the right amount (thanks Watermom).

I read another ongoing thread in this forum and I feel like I'm suffering from the same issues as others this season due to, what I think may be, an oversized pump. I'm running a 1.5 HP Hayward Superpump through a Hayward S244S sand filter and, after checking with my pool installer, found out that my pump is at the upper limits of the filter specs. Last year the water was crystal clear all season long. Now that I had a seriously green pool to start and really need to filter the dead bacteria out of the water it may be pushing too hard to filter as effectively as I need it to. Although, the DE project seems to have helped some. I can now see the bottom of my shallow end...We're at least seeing some progress. I'll keep at the DE 'thing' until it clears up. I'll probably be due for another backwash by the end of the day as the pressure continues to rise (obviously a good sign!).

Thanks,
JP