Just did AA treatment. Before AA, CYA is 40.
After AA, CYA < 30.
What happened to CYA?
Here is what I added during AA treatment.
Let CF to 0, and added Poly 60 for 8oz/10k gal
Added 2 lb AA, and some MA to lower pH below 7.2.
Added 2 bottles of Pink Stuff
After 24 hours, although the improvement is not significant (maybe the stains are not so heavy even before AA),
I added 4lb of baking soda to increase TA from 70 to 80~90.
Added some MA to let pH stay < 7.2. (but increase quickly back to 7.4 after a couple of hours)
Added about 1 gal 8.25% bleach to bring up FC back to 3ppm.
The problem is the CYA is less than 30 now
What has happened? Should I wait a couple of day to test CYA again before adding stabilizer?
If I have to add stabilizer, can I use some leftover Trichlor pucks according to PoolCalculator to increase CYA?