We just opened our pool today and took a sample to Leslies for the fun of it and because I was pretty sure we needed stabilizer. I test at home using a Taylor kit so I generally trust my own numbers. How accurate is a pool store with CYA levels? She read it at 50 so I tested it when I got home and at 30 I could still see the black dot. Is the dot suppose to be totally gone to then read the level? Also she gave me a FC reading of 5 where I get 20 at home! The pool company shocked our pool so I tend to think she is way off!