I've noticed a few stains on the floor of the liner. I rubbed a vitamin c tablet on one of them, and pic 1 (taken under water) shows what it looked like afterwards. I had to rub quite hard for a few minutes for the stain to go. I am not sure if it was metal or not.
[attachment=1:ne55flsi]IMG_1937.jpg[/attachment:ne55flsi]
This pic shows an example of other stains dotted around the pool floor. I think they have gradually developed over the last season. I was using Trichlor until a couple of weeks ago, and suspect my pH was < 7.
[attachment=0:ne55flsi]IMG_1926.jpg[/attachment:ne55flsi]
Any suggestions on how to get rid of the stains?
current test results
FC 9.5
pH 7.6
TA 100
CC 0
CYA 80
[attachment=1:ne55flsi]IMG_1937.jpg[/attachment:ne55flsi]
This pic shows an example of other stains dotted around the pool floor. I think they have gradually developed over the last season. I was using Trichlor until a couple of weeks ago, and suspect my pH was < 7.
[attachment=0:ne55flsi]IMG_1926.jpg[/attachment:ne55flsi]
Any suggestions on how to get rid of the stains?
current test results
FC 9.5
pH 7.6
TA 100
CC 0
CYA 80