Am following TFP advice and pool is fine and pretty much matches PoolMath.
But it soaks up chlorine and acid like a sponge. Am using 5.25% bleach from local hardware.
So set out to find stronger chlorine and found the HASA web site
seems like an Ok company
where I see recommended
FC 1.5 to 3
CYA 60 to 80
the TFP chlorine/CYA chart shows at 60 CYA a min FC of 5
so am confused? how to explain the different recommendations?