My FC held strong at right around 5 overnght, so, the pool is open for business. The family went swimming today for the first time since starting this last week. I came home to jump in myself and decided to test the water...because I can with my new test kit
FC=1 ?! 1ish even
What in the world would cause a crash that fast? Hot Florida day + few swimmers for a couple of hours = 4 point drop in FC?
Not only that, but my CYA which was high at 70-75 SHOT up to like 100. Would THAT cause the FC to crash? Makes sense. SO the question is then what would cause the CYA to skyrocket after a few days steady around 70?
Needless to say, the drains are open and I'm dropping some water to replace tonight. The question is, how much should I be replacing (not that I can meter the amount I'm changing more than a physicall drop measurement at pool level...like drop the pool 3") (16x30 rectangular diamondbrite finish inground).
Thanks again all!