Iron Stains: Do Ascorbic Acid + Sequestrant prior to using CuLator bag?

phappy

Well-known member
Aug 25, 2013
58
Hi all. Happy Summer '22.

I've done two partial drain & fills over the years in an effort to remove metals. But it's too costly to keep doing. So I purchased a CuLator bag, and hope to get the remaining .45 iron out of the water. This is just a question about your thoughts on the process.

When using a CuLator bag:

- Is it best to first do an ascorbic acid treatment (always works well), which will get the metals into solution.
- And then use a sequestering agent to "bind" the metals.

???

Should the Culator better work if the metals are already in solution and bound by the sequestrant?

Thanks as always for the kind advice & help.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
51,241
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
The forum has not found the bag thing to work very well. The best way to remove iron is using polyfill and or a specific iron water filter. You cannot have the iron sequestered to remove it. It must be in the 'rust' stage to be filtered.
 

JoyfulNoise

TFP Expert
Platinum Supporter
May 23, 2015
21,360
Tucson, AZ
Pool Size
16000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
TFP doesn’t really recommend using CuLators. They are one of those pool products that sound believable but do nothing useful. How is a small bag of ion exchange resin which most of the pool water is going to flow around, and not through, suppose to help?? Even if you believed that the ion exchange resin will work, the hydraulics simply make no sense.

But it’s your pool and your money so it’s your choice to go down that road.

The ion exchange resin in the culator bag acts to attract metal ions. You can think of it as a physical sequestering agent. If you add a chemical sequestering agent to your pool water and the metal ions have a greater affinity for the HEDP in the sequestering chemical, then the CuLator will not remove the ion from the solution. Since the CuLator uses a proprietary resin, there’s no way to know for sure if it will work with a sequestering chemical in the water. You should probably email their customer/technical support and ask them.

As far as the stains go, if there are visible stains then that is metal that has come out of solution. You have to lift the stains first before the metal ions can be removed by some other method.
 

phappy

Well-known member
Aug 25, 2013
58
mknauss and JofulNoise, thank you for replying with such quality information. TFP forums have the best people.

Well, at this stage...I ordered one CuLator packet/bag. So...I guess I'll have to give it a shot. Though in reading more about the ion attraction and thinking of the physical movement of the water, I too think it will be a long shot to produce any quality results.

Thanks for advising that I should not use a sequestering agent. Good stuff, and an expense saved. Thank you again friends.
 
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