I was at 5ppm last night, 5ppm when I checked it this morning. Now a few hours later it had dropped to 2. CYA is 45
I completed a slam several days ago because of overnight chlorine loss (no sign of algae and water looked great though). My water temp was very high, about 94, and the slam took I believe 3 days. Afterwords I had to do another asorbic acid test for stain removal. Instead of bringing the chlorine up really slowly, I just added chlorine till it would hold at the normal level. I wasn't about to let the warm pool sit there for days with hardly any chlorine, then just have to do another slam, and another asorbic acid treatment, and repeat.
Could the daytime chlorine loss still be something with the asorbic acid? Like the asorbic acid and chlorine reaction only happens with sunlight?
Another thing to note, is that several weeks ago my total alkalinity was 120, and now its 240. I am currently aerating and working towards correcting. I did a couple stain treatments over that time and I believe the asrobic acid brought down the ph but not the akalinity. Then when I added soda ash the levels of both the ph and alkalinity were increased. The ph has always been balanced except immediately following the asorbic acid. Could the chlorine loss be increased by the high alkalinity?
The water could not be more clear. The temperature now is down to 85.