Stair, Vinyl Stain Removal

[Cookieman]

I have a light brown stain on fiberglass stairs and a couple of small areas on vinyl liner. Read a lot about the acsorbic acid method (the vitamin C tablet will lighten the stain). I see that a sequestering agent is added after the acsorbic acid clears the stain. What is a sequestering agent and where can you get it. Pool water is balanced and clear - BBB method.

[aylad]

Hi cookieman,

I'm sorry you haven't gotten any responses to this by now--I somehow missed it. A sequestering agent is a chem that will take the metals in your water and keep them in suspension, so they don't drop out and stain your pool. You might look through this thread http://www.poolforum.com/pf2/showthr...g-agent-to-use where Pooldoc discusses some specific sequestrants and where/how to get them.

[PoolDoc]

I've started working with this guy:

http://www.poolforum.com/pf2/showthread.php?15092

on a methodical process to remove his stains.

Take a look, see if it answers your questions, and then post any unanswered questions about the process or how it applies to YOUR pool, here in this thread.

[Cookieman]

Thanks to you both. I began reading reply to MountainStone after I posted. I read it quickly and need to go back read in more detail. Will let you know if I have questions.

[PoolDoc]

Good enough!

[Cookieman]

Ready to buy the materials, but won't try it until we return from vacation. I do have some questions: 1) Will I need to adjust chemical quantities purchased based on my pool size since different than MountainStone? 2) I have read other posts in which Jacks Magic Purple/Pink was used with ascorbic acid. Is the advantage of this newer method to have a highe success rate of removing the stains and lessen the possiblity of the stains recurring? 3) Since I have a sand filter vs cartridge like MountainStone, will I still need to use the cal hypo? If so will that have to be my permanent source of chlorine? Will I be able to go back to other sources like bleach or tabs (when my CYA gets low). 4) Will I need to continue to use CuLator permanently or just as needed.

Other unrelated questions - What is best place to put tabs - chlorinator, skimmer, floatie.... I have read varying opinions. I have also seen analytical numbers in posts referring to FC levels of 3.2. I have the Taylor 2006, but unless I am missing something with the drop counts, I don't see how you can get finer than .5 ppm? Am I missing anything?

Thanks so much for all the help.....you just don't know how much I have enjoyed not going to a pool store in the last 7 months!!