Some cousins moved to our neck of the woods. We agreed to help them with their pool, which was filled with algae. Initially we added pure (unbuffered/unconditioned) shock. They got some other shock which obviously had CYA in it.
Here's where things are:
TA off the scale
pH about 8.
Pool is approx. 15,000 gal.
Outdoor direct sunlight
Pump FR etc. unknown.
Not really worried about the pool maintainance/issues per se, realize we will have to drain about 10 - 20% H20 to realize a lower CYA, also know that the FC maybe should be a little higher, but I'm puzzled.
If the CYA "binds" the Cl, then how can CYA test +? Is the CYA test testing for a part of the CYA rather than CYA per se? (Doesn't make sense to me, as I vaguely remember from HS Chemistry that acid + alkali = salt + H20 ----so why isn't the CYA being used up?). Unless the CYA is acting as a catalyst, but then, why wouldn't the pool test more acidic......???
Hoping some chem nerd out there can give me a formula or two and set me straight.....