I have iron stained calcium deposits on the vinyl liner of the pool. They are heaviest on the slope leading to the deep end but also are on the walls of the deep end. The are not covering huge areas but there are a lot of small deposits throughout making it not look bad. I tested the stuff by scraping off a few small pieces and placing them in acid. They foamed and were quickly dissolved. Is there any other way to disolve the scaling besides me getting my dive gear on and spending a couple hrs under water scraping and brushing? Here are todays test results:
FC-5 CC-0 TA-160 pH-7.6 CYA-48
After testing I added 8 cups of bleach and 4 cups of acid to target a pH of 7.4 and a FC of 6.
Thank You. Dave