Mike b

I hope water ear is still monitoring this forum. I followed your directions to the letter and all worked out great. Pool was extremely bad but after dropping the chlorine to 0 the absorbing acid had a dramatic effect. The only thing I did a little different because I had stains above the waterline. So on my appx 20,000 gal fiberglass pool I added 1.5 lb ascorbic directly to pool and made a paste of .5 lb and rubbed it around lip and water line of pool. After an hour I added the metal out and polyquat. I also wet down the lip of pool to wipe the glaze I put on it into the water. 24 hours the pool was 96% white again. And I'm talking the pool walls steps and seats were black/ brown. At the 24 hour mark reapplied 1 lb of ascorbic acid it took of the small remaining spots of black. I have been bringing the chlorine up slow with 12.5% liquid and have been checking my #'s with a Taylor 2500 kit. After about a week they started to hold. My ph has remained hi 8 to a stabilized 7.6' cynuric acid has went from 100 to 75, total alkalinity from 200 to175 still hi. Haven't been able to geta good calcium reading, I believe it's about 125 but while testing I don't really get a good red more like light pink and never a good blue more like light purple. I retread the water book and tried the cures to the most common mistakes but it did not work(and I am not color blind). Well it's been 14 days at about the 11 day mark I noticed I could see a faint dark water line. Also the last 5 days upon back washing the discharge has been a dark aqua marine color initially followed by clear after a while. Filter a hayward sand type has been running constantly for over 12 days. Day 10 I started to introduce slow dissolving chlorine tabs to my hayward auto chlorinator with liquid still added to my skimmer. My day 12 chems read FC 5,TC 5, ph 7.6, tot alk 175, calc hardness though I'm not comfortable with because of mentioned issue read 125, cynuric acid 75. Now I cut chlorine because of the spike and on day 14 I read FC 0, TC 0, PH7.6,calcium 110. I dosed it heavy with liquid chlorine in skimmer maybe 2qts. Anyway I now have a black ring at water line moving all the way up wall away from water. I reread post for 100 th time. Checked my ph and it had climbed to 8. I don't know if I caught it but the Taylor book called for 5 lbs of ph decreaser ( granuilized acid)in order to bring ph below 7. When I do I will add the dose you suggested of metal magic. If it works cool if not start again I guess??? Can announce point out what I did wrong in this instance?? All seemed to be working great maybe I got into the chlorine too quick. Also when all numbers were good I finally let the kids(about 5) go in so they splashed a lot above the water line.