We have had our pool now for three seasons. We had the sand in our filter replaced last fall. When I opened the pool about 4 weeks ago, I got it clear and reasonably balanced without much hassle. I thought things were looking good. One of the issues was high alkalinity, so I put about 4 pints of muriatic acid into my pool (vinyl,about 20k gallons). The next day, the water became very cloudy. I introduced no other chemical into the water, and the pump was running.
Since then, I have had the water tested a few times and tried a few different suggestions from my pool store people. The last water test yielded the following result 5 days ago: TC 1.6, FC 0, pH 7.1, TA 188, Hardness 242, CYA 113. Salt level was 3400. I have an Intellichlor salt generator. The chlorine level tends to stay under/around 1 for both TC and FC.
I have tried to add supplemental chlorine through tabs and granular; I have tried all natural clarifier; I have tried the Angry Egg product recommended by my local pool dealer. I backwash the filter regularly as well. Nothing seems to be helping get the water clear again. It's a little frustrating because our neighbor has the EXACT same pool and system, and their water is perfectly clear and all they do is add salt to their water!
I am hoping someone in this forum can point me in the right direction if you've had similar experiences. The only thing that I did when the water was clear was add the muriatic acid to try to lower the Alkalinity, and the water hasn't been the same. I run the pump 24/7 these days and I've only seen small improvements (i.e. I can sort-of see the liner pattern in the shallow ends, and sort-of see the main drains which are in the deep water (5.5')
Should I just be patient? Will the filter eventually clear it up? Keep adding stuff? If so, what stuff?
Thanks in advance for anyone who can point me in the right direction!