Thanks for your imput lacygirl. As far as reading is concerned I have a degree in Engineering and 18 years experience working on pools I think I have that covered. I did not mention my CYA numbers because I don't have them in front of me I'm posting numbers from memory. I will check the test kit out as well. The pool is not my only area of focus as I am responsible for hvac, plumbing, electrical, flooring, housekeeping, a community center and a school which covers 2,000,000 square feet and 5 miles.