RichyRich50

Member
Jul 24, 2022
11
Douglasville
Pool Size
13500
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Hayward Turbo Cell (T-CELL-5)
Need help identifying and removing this
purple spot/stain. Is only around the edges
of the pool. I have a saltwater pool with good
readings. See last picture for results.
 

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The stained area does not feel any different than the rest of pool. I have Vinyl, is an above ground pool. I have tired to brush it lightly and nothing. Also tired to push the chlorine up to 9ppm and nothing. Please let me know if I can provided any more details that would help identify and fix this?
 
Welcome to the forum!

Any copper products used? Algaecide, etc?
Purple typically points to copper cyanurate. Happens when CYA and copper levels are high in the pool water.
 
Yes, so here’s the full story. The pool was opened on June the 30th and the purple stains have been there since the second week. My readings have been all over the place but cooper was always at 0. Last week, I did some research on Pool RX and thought this would fix the purple stain issue but it only made my parameters go all over the place. I just checked my pool chemistry and the copper went from 0 to 0.7ppm. However, the satins were there before any copper readings which I believe was due to Pool RX. I’m attaching my most resent results along with my pool history. Hope this helps!
 

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I been going to Leslie’s for all my pool test. I actually think you’re right. Some how during the first few weeks the high copper readings were missed. With my cooper levels around 0.7ppm do you recommend this treatment? I will attach a picture below. Is a treatment for high metals.

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As it is copper cyanurate, I would like to check with @JamesW The normal treatment to remove copper is to use sulfamic acid and then drain the pool. The stuff you linked to are pool store magic that rarely works.
 
@mknauss I really appreciate you talking the time to figure this out with me. Hopefully @JamesW has some insight on the matter.

Extra information:
the High metal treatment that I posted earlier was Leslie’s recommendation for my high copper level “0.7”
 

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Well, that is nice that Leslies says that. To be honest, this forum does not accept pool store testing for any guidance nor believe the majority of pool stores have the pool owners best interest in mind.

The best way to attempt to remove copper stains (not necessarily always successful) is to use Jack's Magic Blue Stuff and then dump the pool water for fresh.
 

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Just a quick rant regarding a particular popular pool supply store.

Today I was at said pool store and was waiting in line and, to my horror, watched an employee field a customer question "I have algae in my pool how do I get rid of it?"

The employee asks some basic questions and the owner knew NOTHING I repeat had ZERO information about his pool. The size, material, PH good lord he had not one detail available, did this stop the employee from trying to sell him a bunch of stuff?

NOPE

The employee calmly walks the guy over to where the chemicals are and literally loads them into the guys arms repeating what the water test printouts typically say if you tick the "algae present" box, a jug of green to clean three bags of power powder plus and walks back over to ring the guy up, the whole time stammering "yeah it would be super helpful if you could bring a sample in so we can test it for ya but here's stuff you can buy today to get ya started."

This is not the first time I have watched this person treat his customer so....I can't find the words.

I ran a nutrition store for years, I understand completely that it is a sales driven business but it is also primarily a SERVICE for pool owners. If it is not serving its customers with their best interest in mind, well that's a problem.

I have considered talking to the manager a couple times and now I just might. The other employee I see I have some respect for, it's ironic that he is actually pretty sharp but he is a lot less aggressive. This other guy though...I can't imagine how many people have spent money there and vowed never to go back.

The silver lining today was that the customer just gave dude an evil eye said he would be back and bought nothing. This employee just isn't too bright, pool owners typically are halfway intelligent and usually have money. That does not make them easy marks, despite how they come across.
 
If he should have iron in his pool, the vitamins C will lift that stain almost instantly. Will eliminate iron as a concern. Sounds like Marty identified the problem in post #4 anyway.
 
What are you hoping or expecting to happen?
Looking for any reaction or no reaction.

It might make a clear spot, or change colors or maybe nothing.

The reaction can help indicate if ascorbic acid would work.

If it makes a clear spot, then ascorbic acid might work.

If no reaction or if the tablet makes a dark spot, you can try citric acid, oxalic acid or sulfamic acid.


Note that any treatment for copper can sometimes make the stains worse, so all treatment chemicals need to be tested on a spot first.

All treatment is at your own risk based on your own research.

Pool Stain Treat is oxalic acid.




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