We did a series of drains on our fiberglass pool. On Friday afternoon, took a sample to the private pool store and they said I was at 15ppm CYA. Said the alk was 226 and pH was 7.8. Then I took a sample to L****es. They said I had 40 CYA and 7.8 pH. She also said I had high phosphates, but I recall you guys think that's a Leslies thing. Then on Saturday morning I took another sample back to the private pool store (who runs tests with a computer) and they said my CYA was 35ppm with Alk of 200 and pH of 7.7. My own CYA test, which I have challenges with, shows closer to 40.

So, where should I go from here? They tell me I should add a gallon of Muriatic acid, which I'm willing to do. I'm tempted to add the acid and then just follow the chlorine closely. Anybody have a better idea?