Stains returning

[MartyW]

After I did the ascorbic acid and the seqestering agent my pool looked great. I slowly raised the chlorine level with bleach and a couple of pucks in the feeder. My PH didn't drop much, so I added a little Borax. Now about 2 weeks later I see the stains returning. I backwashed the filter after the treatment. I added to my last post but got no response. All my readings are there. I just added more sequestering agent in the hopes it will clear up without another dose of ascorbic acid. I can't figure out what is going on. I haven't added well water, and my well is not supposed to have any iron anyway.

HELP !

Marty

[waterbear]

You either did not have enough sequestering agent in the water or you brought your chlorine levels up too quickly. Or possibly you brought you pH up too high with the borax. Post your numbers, it would help.

[MartyW]

Thanks Waterbear,
I had put my readings in the earlier post I had edited. I added another bottle of sequestering agent last night (supposed to treat 20k gallons, I have 18k) I do think it looks a little whiter this morning. Here are my readings, the only change seems to be the CYA. FC=1.5; CC=0.5; TC=1.5; pH=7.4; ALK=70; CAL=30; CYA=100; TEMP=85. Will I need to add sequesterant on a regular basis to prevent staining?
Again thanks for your help.
Marty

[waterbear]

Thanks Waterbear,
Will I need to add sequesterant on a regular basis to prevent staining?
Again thanks for your help.
Marty

Yes, keep adding the recommended maintenance dose and you need to keep an eye on your pH...don't let it get above 7.6 or staining could occur again.

[MartyW]

So if I understand this, the metal is in the water and it can't be removed? I will always have to use a sequesterant as routine maintenance? Is there other sources to purchase it in larger quantities?
Thanks for you help

Marty

[waterbear]

So if I understand this, the metal is in the water and it can't be removed?
pretty much, unless you drain and refill with water that has no metal or the metal comes out of the water as stain.
I will always have to use a sequesterant as routine maintenance? Is there other sources to purchase it in larger quantities?
Not that I know of but the maintenance dose is only a couple of oz. ususally every week or two....sometimes you can get by putting it in once a month.
Thanks for you help

Marty

hope this helps.