- Dec 13, 2018
- 436
- Pool Size
- 30000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
At the beginning of the year, my CYA was 60ppm. I have been struggling all year to get my CYA up. It seems to always drift down to 50ppm.
So since the beginning of the year (Jan), I have added 131 Oz. of CYA (sometimes in sock in skimmer basket and sometimes in sock hanging in front of a return). This should have raised CYA to 128 ppm (per Pool Math). Assuming I am losing 5 ppm per month, my CYA should be about 108. However, it is still between 50-60ppm.
I ordered the CYA calibration standard and I am seeing the dot disappear at 50ppm and testing in same conditions, so I feel good about the test results.
I added another 12.8 oz. tonight (all I had on hand), which should put me over 60ppm.
I have a lot of evaporation due to heated water and splash over bowls, but I should not be losing CYA due to evaporation. I did a bucket test a few times and did not see any significant difference in pool water vs. bucket water.
One theory I have is that I am possibly cleaning the filter too soon after adding the CYA. So this time I cleaned filter first and then added CYA (in sock in skimmer basket). I should not have to clean for at least 2 weeks or more. Just came off a SLAM and everything is pretty clean.
Another theory is that the CYA is bad. I bought some from Lowe's and some from Home Depot.
My question is, where is it going?
P.S. My PoolMath logs are not fully back logged yet. I am still inputting information from my spreadsheet to the app. I'm only back to beginning of month.
So since the beginning of the year (Jan), I have added 131 Oz. of CYA (sometimes in sock in skimmer basket and sometimes in sock hanging in front of a return). This should have raised CYA to 128 ppm (per Pool Math). Assuming I am losing 5 ppm per month, my CYA should be about 108. However, it is still between 50-60ppm.
I ordered the CYA calibration standard and I am seeing the dot disappear at 50ppm and testing in same conditions, so I feel good about the test results.
I added another 12.8 oz. tonight (all I had on hand), which should put me over 60ppm.
I have a lot of evaporation due to heated water and splash over bowls, but I should not be losing CYA due to evaporation. I did a bucket test a few times and did not see any significant difference in pool water vs. bucket water.
One theory I have is that I am possibly cleaning the filter too soon after adding the CYA. So this time I cleaned filter first and then added CYA (in sock in skimmer basket). I should not have to clean for at least 2 weeks or more. Just came off a SLAM and everything is pretty clean.
Another theory is that the CYA is bad. I bought some from Lowe's and some from Home Depot.
My question is, where is it going?
P.S. My PoolMath logs are not fully back logged yet. I am still inputting information from my spreadsheet to the app. I'm only back to beginning of month.
