Hello Watermom, I have an in ground, 26k gallon vinyl liner pool, sand filter, city water. I have a drops based kit that I got from Walmart that test for chlorine, ph, and bromide. My water is blue and cloudy. I cannot see the bottom of the shallow or deep end. I can see the second step on the shallow end. The water color actually looks neat but it is not clear. The only thing I have been adding for the last month is regular bleach from Walmart and 20 mule borax from Walmart. I will try to post numbers this weekend if not I will post them Monday morning.