Okay...had water tested at pool store with following stats: FC 3.0; CC 0; ph 8.0; Hardness 450; Alkalinity 145; CA 65; 1500 Phosphates. Consulted Pool Calculator and added needed Chlorine and Acid. Am reluctant to replace any water since we are on a well and are in the midst of severe drought in Central Texas. I do know that we have very hard water and also have Luder stone edge around the hot tub and half of the pool which is being eroded by the salt water. Could this erosion be causing my high calcium level? Are there any other solutions other than replacing water? We have an auto fill feature. Thanks in advance for any advice. P.S. Is there anyway I could set up auto notification on my Blackberry when I receive a response to a post?