FC = 8 (added calhypo last night, did not test after addition)
CC = trace, call it 0.5 maybe
pH = 7.7 (will add some acid today)
TA = 170 (same as before)
CH = 240 (same as before)
CYA = 40 (down from 60 - may be my error before due to uncertainty of "dissappear")
So, first, given that my pool gets a lot of sun in sunny Texas, do I want to shoot for a slightly higher CYA value? Seems that in general, I'd want it somewhat high for the summer, maybe somewhat lower for the winter.
I think I may need to shock because I keep seeing a hint of algae on parts of the spa and the shallow side of the pool. Just a trace, but I suspect that I need to kill it, not just slow it down -- right?
The circulation pattern of the pool may not be ideal. I believe the pool leak testing guy changed the direction of the returns, I can't seem to get them to turn even when the circulation is off.
When shocking, I read that you test after adding the suggested amount of chlorine at night, then adjust, then test "before the sun hits the pool" -- is that Direct Sunlight? or just general daylight? The pool is shaded by trees to the north and gets actual sun at maybe 9 AM, maybe dappled bits of sun much earlier though.
And, the directions say to remove the Polaris before shocking. Necessary?
Finally, I think the recurring algae may be comming from the waterfall. I am wondering if I need to keep it running more to keep it well chlorinated. Otherwise, with running for 2 hours in late afternoon, the chlorine there must be long gone sometime after it is shut down. I'm thinking maybe I need to run it an hour or so, a few times a day?