I think my CYA is 60 but honestly I keep looking at it and it's so sensitive that I'm not sure and it may be closer to 70. I know the strips are inaccurate but just for comparison, the CYA on the strips is definitely between 30-50. So having two sources, one I can't really tell and the other I can't really trust, I figure my CYA is 60. Because of my uncertainty, last night I threw an extra gallon of chlorine in. First test this morning, FC was 26, and now, after a lot of afternoon sun (4:45 pm EST), it's back to 24. The water is pretty clear, I think as clear as it gets.
I was thinking tonight I'll do the OCLT, but in the meantime the pH has crept up to 7.8, and I'm not so sure about the TAC*. Should I adjust the pH or TAC in the pool before doing the OCLT? Will that affect the test? And if not, when should I start to worry about those things?
*Re: the TAC measurement, at around 11 drops (110 ppm) the water turns from green to pinkish but then clear, and about after 5 seconds, turns a little greenish again. It doesn't stay pink until 14 drops (140 ppm). Which is the correct measurement? Just for comparison, on the strips the TAC looks around 100.
Thanks for your help, this resource is amazing
Chris
Hardness <50
FC 24
CC somewhere between 0 and 0.5
pH 7.8
TAC 140?
CYA 60?
I was thinking tonight I'll do the OCLT, but in the meantime the pH has crept up to 7.8, and I'm not so sure about the TAC*. Should I adjust the pH or TAC in the pool before doing the OCLT? Will that affect the test? And if not, when should I start to worry about those things?
*Re: the TAC measurement, at around 11 drops (110 ppm) the water turns from green to pinkish but then clear, and about after 5 seconds, turns a little greenish again. It doesn't stay pink until 14 drops (140 ppm). Which is the correct measurement? Just for comparison, on the strips the TAC looks around 100.
Thanks for your help, this resource is amazing
Chris
Hardness <50
FC 24
CC somewhere between 0 and 0.5
pH 7.8
TAC 140?
CYA 60?