Hi, I tried few things but clueless about the problem. My skimmer suction is very low, there is hardly water flowing into skimmers. Skimmers baskets are clean, filter cap is sealed and not transparent so can’t open, backwashed, water level is above half of skimmer line, pressure is around 10 , blew lines with shop vac incase of any debris. only thing I did where it’s working temporarily is to loosen the top valve of my salt filter. When I loosen it, air gushes ( not sure in or out), when I turn on, the suction is faster BUT there are bubbles coming out of the deep side return jets ( I have 3 jets, 2 shallow end and one deep end close the filter). Looking for insights. Thanks