I am using a hayward pump and sand filter power flo lx 1hp pump and a sp210 filter. I installed everything last year in july, when i installed the sandpump it held a psi of 11 i noticed three weeks ago that the psi had dropped to 9. I backwashed it real good and rinsed and the psi jumped back up to 10 well to day i looked and it is at 8psi.
Is this a sign that the sand is dirty or have i got another problem. We have had bad pollen already due to crazy south georgia weather and the last two times i backwashed it looked like lemonade.
I am only a year into being a pool owner and my first winter and pollen season so this may be the norm for a heavy pollen area.
Thanks for any help.