i do not add stabilizer and i am not sure my test kit will measure cya - what does cya stand for ? - i do have a couple of old kits that may measure what you need to know - if the total alkalinity test is what i do with the blue drop and should be 8 to 10 drops then its good but as far as the cya i will try to find out and the calcium hardness well that may take a few days - im not sure i can do that test but will do some reading on it and see if one of the test kits will do that - thanks for the help - if i need to be adding some stabilizer to the pool can you make some suggestions for me ?