I am new to posting in this forum and only do so because I have spent way too much time trying to find an answer to my problem, sorry. If I could find it, I wouldn't be asking. On the other hand, I love this site!! thanks!
Problem-I have been having a fit with my 25,000 gal. inground vinyl liner pool!! I am about ready to fill it with dirt. I keep getting this stain on the entire pool surface, liner, walkout etc. I just recently found 3 small holes in my liner, about the size of a metal dart tip. Could this be what has been causing my stain problems? Also My CYA is high 80, and I am having a hard time bringing up the PH level 7.2. I have removed water 4 times to bring down my CYA.
As for the staining I have used vitamins C, and commercial stain remover at different times. These products worked but the stain comes back. I was told that I am defeating my purpose in using any stain removal product if my chlorine is not at 0 when using them. Can't bring down chlorine with temps close to 100 everyday (west TN.) I was also told that the stains will always come back if I had recently shocked the pool prior to use of stain removers or within 4 days after use.
I purchased a patch kit at wally world that took care of the punctures in the liner. Now I would like to resolve the stain problem; What could be the cause, and how to correct it.
Free Chlorine (FC) 4 ppm
Combine Chlorine (CC) 1 ppm
Total Chlorine (TC) 5 ppm
Total Alkalinity (TA) 100
Calcium Hardness (CH) 120
Cyanuric Acid 80
Chlorination - pucks in chlorinator (feeder)