Thankful there is a forum for pool aficionados to go to for help.
We have a Hayward CX1750 re filter (cartridge is perhaps 18 months old and the pool is rarely used (and always spotless) so to me the cartridge has not seen very high mileage), and a Sta-Rite 1 hp (1.65 hp) pump model p6e6e-206L running on a 20,000 gallon saltwater pool. recently added cyanuric acid so I needed to leave out filter baskets for a couple days. Ran through the process. Of course that is supposed to raise the pressure some for a couple of days. After four or five days, realized that pre