I have been following TFP method since July 2017 and my pool water has never looked better or been as easy to maintain. However, I have an issue with the build-up of a white substance on my salt cell.
This cell was installed in October 2015. Here is a photo of the build-up as at 24/04/17
I have diligently kept my chemical levels all within TFP range for my size/type of pool and am wondering why this build-up continued on my cell. These photos were taken 26/03/18
My calcium hardness level during this period has been in the range of 225ppm – 300ppm and generally sits at 290ppm. A pool shop tested CH at 205ppm in October 2017 and 189ppm in January 2018 (my test at this time was 290ppm).
My CSI during this period has been in the range of -0.20 and -0.89 and my pH between 7.3 and 7.8
My fill water tested at 110ppm in October 2017 (my test) and I have not added any calcium chloride since May 2017.
Due to an on-going metal staining issue I was adding 1 cup of sequestrant on a fortnightly basis following an initial dose commencing May 2017. My phosphate level has climbed from 186ppb in May 2017 to over 5093ppb when last tested in January 2018 (pool shop tests).
To address the metal issue we replaced the gal fittings in our taps in January 2018 (I'm sorry, I don't know how to link to that post) and in March installed a water filter for our pool top-up water.
I have not added any further sequestrant since the water filter installation and to date have not had a return of metal staining.
Could the build-up on the cell be from the phosphates or is my CH level too high? I cleaned the cell in March 2018 and to date there are just a few tiny specks that have reappeared.
As it is winter in Australia I have not been testing as regularly as I normally do so my last full test results were done 01/06/18 and were as follows:
FC 12.5 (had not turned cell down low enough to account for the lower FC demand)
CC 0.5 (there was a dead mouse in the skimmer basket)
pH 7.8 (not reliable due to FC being above 10 but did add 150mls of acid to reduce by 0.3)
TA 70
CH 290
CYA 80
Salt 4200
Pool Temp 10.2°C
CSI -0.53
Any advice would be greatly appreciated, thank you.
This cell was installed in October 2015. Here is a photo of the build-up as at 24/04/17
I have diligently kept my chemical levels all within TFP range for my size/type of pool and am wondering why this build-up continued on my cell. These photos were taken 26/03/18
My calcium hardness level during this period has been in the range of 225ppm – 300ppm and generally sits at 290ppm. A pool shop tested CH at 205ppm in October 2017 and 189ppm in January 2018 (my test at this time was 290ppm).
My CSI during this period has been in the range of -0.20 and -0.89 and my pH between 7.3 and 7.8
My fill water tested at 110ppm in October 2017 (my test) and I have not added any calcium chloride since May 2017.
Due to an on-going metal staining issue I was adding 1 cup of sequestrant on a fortnightly basis following an initial dose commencing May 2017. My phosphate level has climbed from 186ppb in May 2017 to over 5093ppb when last tested in January 2018 (pool shop tests).
To address the metal issue we replaced the gal fittings in our taps in January 2018 (I'm sorry, I don't know how to link to that post) and in March installed a water filter for our pool top-up water.
I have not added any further sequestrant since the water filter installation and to date have not had a return of metal staining.
Could the build-up on the cell be from the phosphates or is my CH level too high? I cleaned the cell in March 2018 and to date there are just a few tiny specks that have reappeared.
As it is winter in Australia I have not been testing as regularly as I normally do so my last full test results were done 01/06/18 and were as follows:
FC 12.5 (had not turned cell down low enough to account for the lower FC demand)
CC 0.5 (there was a dead mouse in the skimmer basket)
pH 7.8 (not reliable due to FC being above 10 but did add 150mls of acid to reduce by 0.3)
TA 70
CH 290
CYA 80
Salt 4200
Pool Temp 10.2°C
CSI -0.53
Any advice would be greatly appreciated, thank you.