Hi, my sand filter does an acceptable job of cleaning the pool water, but at times the water in the deep end gets a bit cloudy-looking. I bought the house and pool this year and I don't know how old the sand is. I decided to try adding DE according to pool school instructions, 1/2 cup at a time (measuring cup not small enough to accurately do 1/4 cup at a time). So far I've added 2 cups of DE with no rise in the filter pressure, holding steady at its usual 21.5 PSI. I stopped at 2 cups because I was surprised to not see any pressure rise and grew concerned that the DE was being blown out into the pool. Hard to tell if that's the case because the DE is so fine I can't tell if I'm seeing any exiting the returns.
Suggestions? I'm trying to get this figured out before I close the pool for the season, so I'll know what I'm doing when I re-open in the spring. Everything else I've tried from TFP has gone "swimmingly", especially the move to BBB following an algae bloom this summer. Thanks in advance for any feedback on this particular issue.