Peter
Thanks for the input and I started a chart but decited to teach my 13 year old how to use the bleach calc program( great tool, many thanks to the programmer). I have do am oto test and PH and adjust the cl based on the software and tell me about the PH. Just dont feel good about him messing with muratic acid (wicked stuff). I will test the free cl 1 or 2 times a week just to make sure I dont have any CC and "shock" only when nessary.
Thanks again
Steve