I believe my sand filter is clogged with pollen (it is no longer pumping water out of the jets), and I wanted to add some liquid chlorine to address algae until I can figure out how to clean the filter (just bought the house this week). I put the MP in recirculate mode to bypass the filter, and the suction went crazy. It is pulling water so fast at the skimmers that it sucks a ton of air in (it looks almost like quickly pouring buckets of water into the skimmer basket). The water level is at half the height of the skimmer opening. Should I just out more water in, or could something be wrong with the MP valve? The pool was inspected and pressure tested, no problems found.