Hi all. I am just coming off a SLAM process on my pool. While my chemistry wasn't bad, I was seeing more CC of 0.5 than I previously did. The water was also slightly cloudy, but I could see the main drains fine. I also noticed that I was vacuuming alot more debris than usual, as it was a fine yellow-ish silt that would sit in the liner seams. I've since discovered that it may have been mustard algae, as I also noticed a yellow tint in some corners just prior to SLAMing.
Water chem just before SLAM:
FC 5.5
CC 0.5
PH 7.8 (not sure why this was the case, bc 12 hours before this reading, PH was 7.4, w/ no chemicals added)
ALK 70
CYA 40
I'd note that my pool temp is also regularly 86-89F, and we cover the pool religiously.
I started the SLAM this past Monday, and have targeted FC to 16. I checked CL levels 2x per day (FAS/DPD test), adding CL as needed to reach target, and the FC never got below 10.5 (I was adding ~2 gal of 12.5% CL every day). Pump running at a lower speed (2,000 RPM) continuously. Vacuumed every day, and brushed walls once. I first passed the OCLT test over Wed eve/Thu morn, w/ CC at 0.5 on Thu morning. I took the solar cover off Thu morning, as it was covered up to that point. I kept the levels up for an additional day into today (Friday). I again passed the OCLT test last night, and my CC was at about 0.25.
This morning at 8am, my FC was 16.5, with CC at around 0.25. When I just checked now at 5:30p, and my FC is at 9.5, CC 0.25. We had the pool uncovered today, with a few hours of bather load (2 adults, 2 kids). UV was high, air temp got to about 86, and I heated the pool from 79 to 86. Pool is in direct sunlight from sun-up to about 6p. Does the CL drop of 7ppm seem high over 9.5 hours over this time period? Should I keep up the SLAM, even though my CC is <= 0.5 and I've passed the OCLT for two days now? I also see none of the silt I was seeing before, and no yellow stains. I don't want to stop the SLAM and have whatever was in my pool come back, but I also don't want to pour in CL needlessly either.
Thanks for any and all input!
- pc
Water chem just before SLAM:
FC 5.5
CC 0.5
PH 7.8 (not sure why this was the case, bc 12 hours before this reading, PH was 7.4, w/ no chemicals added)
ALK 70
CYA 40
I'd note that my pool temp is also regularly 86-89F, and we cover the pool religiously.
I started the SLAM this past Monday, and have targeted FC to 16. I checked CL levels 2x per day (FAS/DPD test), adding CL as needed to reach target, and the FC never got below 10.5 (I was adding ~2 gal of 12.5% CL every day). Pump running at a lower speed (2,000 RPM) continuously. Vacuumed every day, and brushed walls once. I first passed the OCLT test over Wed eve/Thu morn, w/ CC at 0.5 on Thu morning. I took the solar cover off Thu morning, as it was covered up to that point. I kept the levels up for an additional day into today (Friday). I again passed the OCLT test last night, and my CC was at about 0.25.
This morning at 8am, my FC was 16.5, with CC at around 0.25. When I just checked now at 5:30p, and my FC is at 9.5, CC 0.25. We had the pool uncovered today, with a few hours of bather load (2 adults, 2 kids). UV was high, air temp got to about 86, and I heated the pool from 79 to 86. Pool is in direct sunlight from sun-up to about 6p. Does the CL drop of 7ppm seem high over 9.5 hours over this time period? Should I keep up the SLAM, even though my CC is <= 0.5 and I've passed the OCLT for two days now? I also see none of the silt I was seeing before, and no yellow stains. I don't want to stop the SLAM and have whatever was in my pool come back, but I also don't want to pour in CL needlessly either.
Thanks for any and all input!
- pc
