Greetings! I've appreciated all the great info on this site for ~4 years now.... kudos to everyone! I'm wondering what the cause(s) may be for recurring slight cloudiness. This happens each summer here in Florida (pool temp in the 80s). I've SLAMed many times, adhering to the SLAM guidelines. (Taylor test kit w/ DPD, check FC level 3-4x daily, OCLT test and clarity pass, etc...) Almost without fail, within about 2 weeks of SLAMing, the water begins to get slightly cloudy again... despite testing every 1-2 days & keeping the FC level at 6-7ppm after SLAMing. (I do mean SLIGHTLY cloudy - I bump up the FC level w/ liquid Cl, or SLAM, or shock with potassium monopersulfate when the water strays noticeably from being sparkly clear.)
Again, I'll affirm that I've followed the SLAM guidelines scrupulously. (I'm retired... got lots of time to obsess over the pool, and am familiar with chemistry.) I wonder if perhaps our water feature is the culprit. We have a stack-rock waterfall along 2 sides of the pool (about 22 ft wide total, and 2 ft high), which has a zillion crevices where crud might hide. I run the waterfall daily for up to 1 hour. I've sprayed it every few weeks with 3-4% chlorine. I've run it for a couple of hours during SLAM... brushed the heck out of it during SLAM... done everything but performed an exorcism. The one thing I haven't done is use algaecides (or add borates).
Thanks for any insights or suggestions!! I'm resigned to keeping the FC level up around 7-8ppm, and occasionally using oxidizing shock if needed. Today's readings (which are pretty typical):
FC: 7
CC: 0.5
Ph: 7.6
TA: 85
CH: 350
CYA: 80
Temp: 85F
I brush & vacuum the pool roughly weekly, year-round.
Again, I'll affirm that I've followed the SLAM guidelines scrupulously. (I'm retired... got lots of time to obsess over the pool, and am familiar with chemistry.) I wonder if perhaps our water feature is the culprit. We have a stack-rock waterfall along 2 sides of the pool (about 22 ft wide total, and 2 ft high), which has a zillion crevices where crud might hide. I run the waterfall daily for up to 1 hour. I've sprayed it every few weeks with 3-4% chlorine. I've run it for a couple of hours during SLAM... brushed the heck out of it during SLAM... done everything but performed an exorcism. The one thing I haven't done is use algaecides (or add borates).
Thanks for any insights or suggestions!! I'm resigned to keeping the FC level up around 7-8ppm, and occasionally using oxidizing shock if needed. Today's readings (which are pretty typical):
FC: 7
CC: 0.5
Ph: 7.6
TA: 85
CH: 350
CYA: 80
Temp: 85F
- 10,000 gallon, IG w/ pebble-tec & tile (includes both pool and attached spa)
- All Hayward: DE filter, NorthStar 1.4HP single-speed pump, H350 gas heater
- T15 Hayward SWG w/ prologic control
- Hayward Tri-star 1/2 HP single-speed pump for waterfall
- Taylor k-2005 test kit w/ DPD
- Screen enclosure over pool. Filled w/ town water as needed.