I thought I was having an issue I bought some aqua chem algeacide 50% threw it in water became cloudy not colored. today it cleared a bit, added bleach waited 2 hours I was not where I should have been, took out my filter and had brownish soot all on filter. I had 2 spares Iv'e started using rinz n reuz filters. I checked the new filter 2 hours later more soot, cleaned out the canister put in a new filter again brought the pool to shock level. I'll test again at 7:30am and vac again but my water is clearing only a bit cloudy now.