Anyone know the recommended psi on a hayward swimclear cartridge filter. My is currently running 25-30 psi and I am wondering if it is time to clean the darn thing. I cannot get a "magic" number the manual only suggests cleaning when psi is 8-10 more than normal. I inherited this pool when we moved into the house in Feb. so I am not sure what normal is. Oh I also have a polaris 5 port system running with this filter and the presssure on that is 20-25psi, if it matters??? Any help is appreciated, and I LOVE this site!!