I recently made the switch to a SWG, and it was installed this past Saturday, 5/27. Earlier this month, I completed a SLAM process, and the water has been crystal clear since then, so I was nervous about screwing things up with the new SWG install. Fortunately, the water still looks great! However, I do have a few questions.
On the day of the SWG install (5/27), I was instructed to keep the SWG off for the first 24 hours. I tested FC that night and it was 5ppm. A little paranoid, I decided to add 1 gallon LC because I was expecting a large swim party the next day plus lots of sunshine, so I thought the water could use an extra boost. The next day (5/28), I turned the SWG on around 1:00pm at 50%. The party went great, lots of swimming & sunshine, and the water still looked clean. I tested FC that evening, and it was 10.5ppm, so I lowered the SWG to 40%. To my surprise, I tested FC on 5/29 and it was 11ppm, so I lowed the SWG to 30%. I tested again today and got the same 11ppm FC reading! So, I lowered the SWG to 20%.
My question is: should I really turn down the percentage any lower? Clearly, the SWG is generating enough chlorine since the FC level is staying above 10ppm. Will keeping the SWG at 20% help extend the life in any way? Also, is there something else that could be contributing to the high FC level? I would've thought it would lower by now without adding any additional chemicals.
Also, my other test results look ok (see below), but salt somehow got too high, so I'll likely need to drain some water and refill.
On the day of the SWG install (5/27), I was instructed to keep the SWG off for the first 24 hours. I tested FC that night and it was 5ppm. A little paranoid, I decided to add 1 gallon LC because I was expecting a large swim party the next day plus lots of sunshine, so I thought the water could use an extra boost. The next day (5/28), I turned the SWG on around 1:00pm at 50%. The party went great, lots of swimming & sunshine, and the water still looked clean. I tested FC that evening, and it was 10.5ppm, so I lowered the SWG to 40%. To my surprise, I tested FC on 5/29 and it was 11ppm, so I lowed the SWG to 30%. I tested again today and got the same 11ppm FC reading! So, I lowered the SWG to 20%.
My question is: should I really turn down the percentage any lower? Clearly, the SWG is generating enough chlorine since the FC level is staying above 10ppm. Will keeping the SWG at 20% help extend the life in any way? Also, is there something else that could be contributing to the high FC level? I would've thought it would lower by now without adding any additional chemicals.
Also, my other test results look ok (see below), but salt somehow got too high, so I'll likely need to drain some water and refill.
- CC: 0ppm
- pH: 7.6
- TA: 60ppm
- CH: 90ppm
- CYA: 50ppm
- Salt: 4,200ppm
