Metal Stains ?

[waterbear]

Sounds like iron stains and they will reoccur if you do not add the sequestrant. Ascorbic acid will drop the pH a bit, don't worry about it in your case.

[gfritz1]

Thanks as they have continue to come back .Use city water so would expect iron not to be the issue . The only other source of iron would be the pool heater which the in and out fittings are some sort of iron .As stated earlier will check on core . So what is recommendation on a sequestrant - Jacks Magic Pink or something else ? Pool is 23000 gals.

I have a lot of Back up from Bioguard can this be used in place of Polyquat ? Do you recommend a culator as suggested below ? In reading your Metal Stain sheet think if follow exactly should be good as until now it has not been on walls . With time to close shortly do you suggested deal with it now or wait until spring ? Im think your suggestion will be now. Anything I should add to water at closing


o As soon as the stain is gone, add HEDP at the rates shown below.
o Put the filter back on filter and leave it on 24/7 for at least the next week.
o If you have purchased a CuLator packages, add it to your skimmer AFTER installing a skim sock.