- May 27, 2019
- 1,621
- Pool Size
- 25000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite Pro (T-15)
I think I ended the season with about 50-60 CYA. The pumps run 24/7, even in the winter (low speed) with a floating thermal cover. I "opened" the pool, meaning I pulled the cover back and cleaned the pool (cleaner stays in and was daily cleaning under the cover). I did a FULL chemical check. pH was above 8. TA 70, which is the regular value. FC was around 5. CH was down to 300 from 350 (rain - washout). Salt was down a similar ratio (2800). I did recalibrate the SWG, since it did not match the Taylor salt test. And I added a bag of salt. I put in 1/2 gallon of Hydrochloric acid. Threw in 40 lbs of salt. And jumped in myself (after heating water to 79-80F!).
CYA was way way down. I've read that CYA does degrade over time, but I was not expecting it to drop to under 30, which is the limit of the test. I could still see the dot, but it was getting toward murky. I'm guessing 20-25 ppm.
Anyway, 10 lbs of CYA on the way. I'm going to leave the CH at 300, which should be fine and maybe helpful to the SWG.
CYA was way way down. I've read that CYA does degrade over time, but I was not expecting it to drop to under 30, which is the limit of the test. I could still see the dot, but it was getting toward murky. I'm guessing 20-25 ppm.
Anyway, 10 lbs of CYA on the way. I'm going to leave the CH at 300, which should be fine and maybe helpful to the SWG.