Odd things seem to be happening. Start the pump (9:30am)and pressure goes to 14/15lbs and stays there. After awhile (12pm), now reads 25lbs; later (3pm) now 33lbs). I started with a clean filter (see my post"new products"). When I start the pump again; back to normal 15/14 and the cycle repeats itself. The pool is not getting cleaner. Chemicals are Ok but now Chlorine is low, I'm debating if I should take the filter apart again. Any ideas would be appreciated.