I have lost about 6 psi in pressure. I have backwashed, cleaned skimmers, etc. I am getting good pressure through the jets still. I do have a small leak in the fitting coming out of the pump going to the filter but it is a very small leak (beads up then drips) and it have been there the majority of the season. I don't think it is the cause. Help please. I started around 115 and it is running about 109 now.