Hows the ascorbic acid treatment going? Just my luck, after I got my water crystal clear seems like more and more stains are appearing on the bottom. Some may be organic but I crushed some vitamin c in a sock and rubbed and they started coming right off so I guess that means they are metal stains. So how hard is this treatment and how expensive is it? Our water looks great and my liner is 10 yrs old, the stains look like crap but just not sure I want to put alot more money into making it look good. I wonder if I bought enough bottles of vitamin c and crushed them and rubbed the stain off, how long before it comes back lol