Amount of abscorbic acid to use

Dazed and confused

Active member
May 29, 2012
What's the recommended amount of abscorbic acid to use in a 21,000 vinyl liner pool. I used 1.5 lbs and it seems it did everything except the deep end. I'm thinking about doing it again before getting chlorine levels up again and at the same time thinking I may just put off till august. Frustrating because I was ready to start getting everything in check again. Any opinions out there?


TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
Silver Spring, MD
It varies widely. Keep adding more until things look right. Or as the directions say "If the stain is not all gone, leave the filter in circulate and add more ascorbic acid close to where you still see stain. Leave it in circulate until all of the stain is gone. (add more ascorbic acid if it circulates for 1/2 hour and there is still stain)."