I just moved into a house with a pool and have never had a pool in my life. The pool is an in ground fiberglass approx 33'l x 15'w 8'-6"at the deep end 3'-6" at shallow end, or so im told because cannot see the bottom shallow or deep end. The filter is a cartridge filter(when started psi was 8). The pool guy came and opened it last week and told me the previous renters of the house did not take care of the pool and it was closed dirty.

The filter has been running since Sunday, I have vacuumed it everyday, cleaned the trap and have been keeping an eye on the pressure not to go above 18. yesterday at 3pm the psi was 18 and I cleaned the cartridge and the psi went back to 8, at 11pm last night the psi was at 16 or 18. Is this normal? How long does it take to even see the bottom. Right now when the vacuum goes in i lose sight of it at about 2'.