Absorbic Acid...How much?

[TheNewPoolGuy]

I had Yellow Mustard Alage. The pool store reccommended Yellow Stuff, by Jacks Magic. My water is crystal clear, but there was yellow stain blotches around the bottom of the liner. My pool is 12' X 20", 8,200 gallons. I then went back and they reccommended that I use EZ-Clor - Metal Magnet- $16.99 for a quart. They reccommended I use the quart in my pool. I did and then they reccommended I use 2 pounds of Pool Stain Treat - United Chemicals - Abscorbic Acid. Mix 4 gallons water to 1 pound Abscorbic Acid, shut down pump and pour mixture into pool where the stains are. I did and nothing happened. I was told that the mixture would sink down to the bottom and remove the yellowinsh stains. It did not work. I still have the stains and I have spent over $80 dollars and I still have the stains.

Confused by bad advice.

P.S. Is this problem fixable? I have gotten into the pool and scrubbed the stains with a brush with no help. My wife and kids refuse to get into the pool untill I get rid of the stains.

[bassadict69]

Drop some vitamin C tablets into your pool & let them sit. If it removes some of the stain then the absorbic acid should work. If not, the acid will not work & you have some stains other than metal.

[TheNewPoolGuy]

I ran the test again with the Abscorbic Acid. This time I shut the pump down for several hours and made sure that the water was completely still. I mixed 1 pound of Abscorbic Acid with 4 gallons water and mixed solution well. I gently poured solution over the stains and the stains started to come clean.

I have an 8,200 gallon pool. I need more Abscorbic Acid. Does anyone know a wholesaler that sells this stuff cheap? I paid $10 per pound at the pool store.

Thanks,

TheNewPoolGuy

[mbar]

Ten dollars a lb is a good price. These are the cheapest I have found so far. Here are two links:
http://www.msm-msm.com/store/agora.c...scorbic%20Acid

http://www.chemistrystore.com/Ascorbic_Acid.htm

I don't dilute the ascorbic acid with water. I just go around the pool and drop it down the sides with the pump on circulate. I have a 16,500 gal pool and only use 1 to 2 lbs for a treatment. Leave the pump on circulate for about an hour. Make sure you put in a sequestering agent. After an hour, or when all of the stain is lifted, turn the pump to filter and leave it on 24/7. After one day start to raise the ph. After 48 hours start to raise the chlorine slowly - if you have a sand or DE filter put a trichlor puck in the skimmer. DO NOT do this if you have a cartridge filter. Don't shock for at least 2 weeks.

[gerri]

I'm anxiously awaiting my Asorbic Acid in the mail to start removing my stains. The chemical from United is Oxalic (sp) acid, not asorbic. I have the United Pool Stain Treat in my pool now.. after 24 hours the stain is slightly lighter but still there and very ugly. I have a 8400 gallon in ground fiberglass pool and I can' wait to get rid of the stains. I hope it's as magical for me as it has been for others.. I'm sick of this spoiling the look of my pool. The stains are everywhere, lesser on the bottom. I scrubbed the steps with Vitamin C tabs in a sock so they finally look pretty clean.

How long do I have to wait after treating with Pool Stain Treat from United to do the Asorbic Acid treatment? My water is pretty cloudy right now.

[mbar]

I would wait till all of the oxalic acid is gone - when the water is clear. If you are going to do the ascorbic acid, then I would raise the chlorine up high to get rid of the oxalic acid, and then let it fall back down to start the ascorbic acid treatment. It shouldn't take more than a couple of days. Make sure when you do the ascorbic acid treatment you also use a sequestering agent - I don't know if you used it with the oxalic acid - that may be why it didn't work so well. I never used the oxalic, so I don't even know what they reccomend on the container. Feel free to ask any questions you have.

[gerri]

On the Pool Stain Treat (oxalic acid) they didn't even say to use a sequestering agent, but from reading here I knew that I needed one so I went ahead and added Aqua Chem Metal, stain and Scale remover.

Today my water is cloudy, no chlorine. I am going to have to try to get some chlorine in the water this evening.

My problem right now is the alkalinity.. it is way high. How do I reduce it?

The Ph was low so I added some borax and will check again in about an hour.

Also, why do you not shock for 2 weeks after a stain treatment? I think I messed up because I shocked last night, 24 hours after the oxalic acid, trying to get the water to clear.

Please help