We have a DE pool filter. We recently pulled out the filter and completely cleaned it out. (We have done this before with no issues, so in theory it's not that we don't know what we're doing for this process.) Pressure was back at normal... about 24. After about 48 hours, it went up to 34-35. We backwashed again, pressure went down to normal and back up after 48 hours. Happened a 3rd time.
Any suggestions?
Any suggestions?