This is my first question after being registered with the site for a good while. I have always been able to get my questions answered by reading "pool school" or other members posts. Thanks for that. Now I have a question:
I tested my CYA after putting in a new liner and refilling the pool and adding CYA on 5/11/09. On May 18 the CYA was 20. Finally got more CYA last week and when I tested today (5/31/09), prior to adding anymore CYA, the CYA is back to zero. How could this be? I have not backwashed or drained any water. We have had a good bit of rain...pool is up maybe three inches. Should I wait for evaporation to bring the water level down 3 to 4 inches and then retest? Would you add more CYA now?
Thanks and really appreciate the knowledge I have gained from your site,
High Point, N.C.