I tested my water yesterday (25,000 gal guinite pool)and the pool co. is here right now opening it up. I decided after last year when the pool co. opened and I purchased the "start-up chemicals" from them, not to buy them again since last year after they left I tested the FC and it was 0. Anyway, here are my #'s - FC,CC, TC -0
PH - 7.8
ALK - 120
Cal - 150
Cya - 55
Besides adding bleach, I think everything else looks ok, based on my #'s from last year. My cya has run the same all last year, but this year to cut down on bleach usage, I want to drain some of the water to see if that will make a difference. We have a community well, which still has to meet the water co. standards, but I assume I should have my reg. water checked first and see if this will cause a problem. I had it checked before and the only thing that was found was a high metal content, I know this since I had to buy a water system since my hair was turning green. Anyway, does this effect the cya or not? How much should I drain at a time? Since I had to have the water trucked in so as to not drain the community system, I can't add too much from my hose at a time. Also I usually use algacide 60 poly and think because of high metal content in my water, I should use some additive to help with this. Any advice would be appreciated. Thanks!!