We just recently purchased a home with an 18,000 gallon pebbletec pool. When we looked at the house, the pool was clear, two days before we moved in it had gone green and cloudy. The owners attempts to clear it up by using all kinds of algecide, etc. from Leslie's suggestion, but it only made it less green but still cloudy. After reading many suggestions on this site, I shocked the pool with liquid chlorine and it has definitely cleared up to where it is now mostly clear. I had a company come by today (Arizona Pima Chem) and they used 100% gas chlorine. I am fine with the concept as it does not introduce other things, but the tech told me my CYA tested at 100 at the start, and that he was adding more CYA to bring it to 120 because it makes the chlorine hold better. He then went on to state that the target is to keep FC at 5 PPM. This seems low based on a CYA of 120.
We were going to use this company while we go away for a month beginning next week, but now I have concerns on their approach, as the last thing I wanted to do was raise my CYA so that I get myself even closer to a drain of the pool. I'd be happy to take any advice anyone has on this situation, as well as be interested in knowing if anyone has a company they use in Tucson and why they like them? I had not had a chance to test the CYA myself yet as I was waiting on my Taylor Kit, but it arrived today so I will check it in the morning to see what I get. I also cannot seem to find a pool store that can give you accurate readings as I have had numbers ranging from 60 to 100 over the last 3 days. That was all with nothing but Liquid Chlorine added. Does anyone have a pool store in Tucson that they feel can provide accurate results?