Pool was severely neglected by previous owners. Metal stained probably 30+% of the bottom.
Maybe 20,000 gallon pool. Plaster.
I used 2 lbs ascorbic acid, and it worked pretty good. 2 days later, I added another 2 lbs. It helped even more. I would guess it got about 85% of all the staining.
I found 11 lbs of ascorbic acid on line in ebay for $60. I expect to receive it in about a week.
I am thinking I will go at it with a heavy dose this time. Maybe to add 5.5 lbs all at once.
What do you think?
The next thing will be to keep the metal from re-depositing. I used Ram Metal Hold, but in looking around, have seen a few people say it is not nearly as good as Jack's Pink Stuff. Any thoughts on that? Also, will I need to keep a regular maintenance dose of any of these sequestering agents "forever?"