Hi all. Opened up yesterday. Was a heavy winter in New England, so water was not as clear as prior years. Spend a lot of time pulling leaves, etc out of the pool before start up. Started up and all systems appeared to be working well. After a few hours, filter pressure went up to around 30 psi and our Paramount water valve pressure would drop from the required 20 psi to 10 (and lower). Have back washed twice, after each time filter pressure goes to normal (28 psi) and Paramount SwingJet water valve goes up to 20, but again pressure continues to drop after running for awhile. Water is clearing, but still needs to be vaccumed and cleaned up some more. Am I losing pressure because of this and need to continue back washing (and vacuum) or is there something else going on that's causing the pressure in filter to climb and water valve to drop significantly? Thanks!