Since it's "cold" here in South Florida, and we're not using the pool, I wanted to try to get rid of the stains in my pool. I moved into this house in 2014, and the pool has had stains since before, and I don't think they are getting worse, which to me seems to be a good thing.
I have been reading about Ascorbic Acid treatment and others, and today I decided to do a little test, (all using a dry sock with a rock inside) and here are the results:
Ascorbic acid (about 7 min): Stain turned darker (brown)
Dry acid (10 min): Cleared the stain
Chlorine puck (5 min): Nothing (or stained a little more, not sure, results are not clear)
Based on those results, what would be the best course of action, known that the most of the stains are on the deep end?
My latest pool chem full test results, from yesterday are:
CH: 250 (added 20oz Calcium Chloride - trying to raise it a little bit since it's the min end based on PoolMath)
It's very windy today, and pictures are not really coming out good, I will take some once winds settle.