This problem has lasted for the past year. Since I found this forum, and am trying the BBB for the first time I am hopeful that I can get control of this problem but right now I'm stymied.
The pool calculator has me adding lots of chlorine and borax, which I have been doing, but it doesn't seem to be making much of a difference. I'm also running 2 chlorine floaters which I'm keeping full of 3" tabs.
The real shock today was that I added 3 packs of shock compound and a 1.4Gal jug of 6% bleach and my FC readings are lower than yesterday.
Today's readings, using Leslie's FAS DPD kit: FC = 0.2, TC = 1 (CC then equals 0.8), PH = 7.0, Base Demand = 17 drops, Alk = 125, CH = 650, CYA = 200. Aside from the direction to replace 80% of my water (an unpopular concept with water rationing in effect) what can I do to bring my readings in line? Is the high CH and CYA levels the reason I can't keep chlorine?
Also, the Pool Calculator suggests reducing TA by dropping pH to 7.0 (already there) and then aerating to increase pH. Dumb question - how do I aerate?
Sure hope someone can help me figure out what's happening with my chlorine.