Hi, all. I let FC get away from me and found it low or 0 once or twice and then developed moderately green pool (4600 gal, above ground).
Results at that time (TF-100 kit):
pH 7.2
FC 2.5
CC 0.5
Alk 240
Hardness 525 (no control, it comes from the well that way)
CYA 30
My CYA was 30, so I maintained FC level between 12 and 16 for a whole week with 10.5% liquid chlorine. I also backwashed frequently when psi rose by 1 or more. That did a little to reduce the green color, but not happy with the progress, so I brought it up to over 20, then over 24, which finally turned the color from green to white and have maintained it over 20 since. I did more TFPC school reading and added brushing the walls to my twice-per-day routine of testing/adding chlorine plus vacuuming every couple of days. Most of the time chlorine barely drops by 1-3 ppm. I had been SLAMing for three weeks. I tried DE powder as described for three days, which helped clear up the white cloudiness significantly. I then got into a cycle of brushing, testing, adding chlorine three times per day.
Finally water was clear and sparkling (like drinking water), the morning's OCLT (Overnight FC Loss Test) was <= 1.0, and CC (combined chloramines) is always 0.5 or lower (I rarely ever see a higher reading than that.)
Results:
pH 7.5
FC 12.5
CC 0.5
Alk 190
Hardness 500
CYA 40
So, I started to let chlorine go back to normal. Two days of sun, all tests and clarity were good (FC still above 10), then one night of rain and boom – slight green color again on the walls. Now I’m in this cycle. The three ending slam tests become good, so I let chlorine go down and boom – slight green color develops again especially if we get any rain. It takes about 3-4 days for chlorine to go back down to normal (5-7), but it rains every few days. The pool is exposed to nearby Australian pines and an oak tree (I think), which is currently dropping its leaves. I clean out debris frequently throughout the day.
Current Results with slight white cloudiness:
FC 19
CC 0.5
CYA 40
Several users have remarked about issues with rain, but generally the responses have all been – keep slamming.
Thank you for reading.
Results at that time (TF-100 kit):
pH 7.2
FC 2.5
CC 0.5
Alk 240
Hardness 525 (no control, it comes from the well that way)
CYA 30
My CYA was 30, so I maintained FC level between 12 and 16 for a whole week with 10.5% liquid chlorine. I also backwashed frequently when psi rose by 1 or more. That did a little to reduce the green color, but not happy with the progress, so I brought it up to over 20, then over 24, which finally turned the color from green to white and have maintained it over 20 since. I did more TFPC school reading and added brushing the walls to my twice-per-day routine of testing/adding chlorine plus vacuuming every couple of days. Most of the time chlorine barely drops by 1-3 ppm. I had been SLAMing for three weeks. I tried DE powder as described for three days, which helped clear up the white cloudiness significantly. I then got into a cycle of brushing, testing, adding chlorine three times per day.
Finally water was clear and sparkling (like drinking water), the morning's OCLT (Overnight FC Loss Test) was <= 1.0, and CC (combined chloramines) is always 0.5 or lower (I rarely ever see a higher reading than that.)
Results:
pH 7.5
FC 12.5
CC 0.5
Alk 190
Hardness 500
CYA 40
So, I started to let chlorine go back to normal. Two days of sun, all tests and clarity were good (FC still above 10), then one night of rain and boom – slight green color again on the walls. Now I’m in this cycle. The three ending slam tests become good, so I let chlorine go down and boom – slight green color develops again especially if we get any rain. It takes about 3-4 days for chlorine to go back down to normal (5-7), but it rains every few days. The pool is exposed to nearby Australian pines and an oak tree (I think), which is currently dropping its leaves. I clean out debris frequently throughout the day.
Current Results with slight white cloudiness:
FC 19
CC 0.5
CYA 40
Several users have remarked about issues with rain, but generally the responses have all been – keep slamming.
Thank you for reading.