The RETURN of the Orange/Brown Stain!

[mbar]

Ha, ha, that's why I went the ascorbic acid route myself - not cheap, just frugal. If you want to go the sequestering agent way first, you lower your ph down to 7., 7.2 and add the sequestering agent - the low ph helps the sequestering agent lift the stain sometimes if it isn't too embedded. I would try this first, because you have to put the sequestering agent in anyway with the ascorbic acid. Oops I just saw that you want to go the ascorbic acid way - How big is your pool? I used 1 1/2 lbs for my 16 x 32 pool about 16,000 gal. You have to lower your cl down to 0, if you want you can put in some polyquat, put the ascorbic acid in put your filter on circulate, let it go for about 1/2 hour, you will be amazed how fast it works. Put in enough sequestering agent, put the filter back to filter and let it filter for 24 hours. It will bring down your ph, so you will have to add borax after 24 hours. It will probably take a lot. Keep the filter running 24/7. After 48 hours start to add chlorine slowly. It will take a lot, because the ascorbic acid will eat up the chlorine. Keep checking and get it back to regular levels in your pool. Do not shock, or take your chlorine really high for at least 2 weeks (hence the algacide). If you have any questions feel free to ask!