Here are the numbers that we got from having the water tested:
Free Available Chlorine .2
Total Chlorine .2
Total Alkalinity 103
ph level 7.2
calcium hardness 23
Cyanuric Acid 99
copper .4

we were told (by pool store person) that we needed to drain 1/3 of pool to get the cya level down and add calcium. Then add more stain out. Does this sound right? Of course, everytime we talk to someone else, there are more chemicals and lots more $!!! Thanks for all of your help!

Pool Info: inground 16,000 gallons, sand filter