We have had our pool about a month and the only thing I seen them add at startup were Salt, Liquid Chlorine and Muriatic Acid. I have a TF-100 kit but questioning my CYA numbers as I had to fill the tube to not be able to see the dot. I took some water to Leslies Pool Supply for testing and was told I had a CYA reading of 0. I purchased a gallon of Conditioner and was told that the entire gallon would raise my pool to around CYA 30.
Two weeks later (today) I take some water back to the same store and now have a CYA reading of 100.
Using my TF-100 kit it appears that I can't see the dot around the 40 level but the guy at the pool store was certain that it was at 100 and told me not to worry about it as it was within acceptable levels.
He also said I have a phosphate level of 500 and sold me another $40 jug of "PhosFree".
What would you guys recommend as the proper way to proceed? Drain water, test again, etc.?