Metal stains and water color changed to Green

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JoeyV

JoeyV

0
Jun 3, 2017
30
Bridgewater new jersey
Hello,

This is the first year dealing with metal in water. At the start of the season, i shocked the pool with 2lbs of a product called Pool time Shock MaxBlue fast dissolving 6 in 1 pool shock. The label says it has .26% Copper metallic in it. Would this be enough to cause my pool stairs to stain brown and pool water turn green?
 
So there is probably not any iron in your water. Yes it is possible that you added enough copper for it to be causing problems. You can treat the pool with sequestrant to bind the copper and hopefully lift the stains and then either drain and refill with copper free water or continue topping off the sequestrant to keep the copper in solution and not staining your pool surfaces.
 
I don't know. I went to Leslie's, they had me add metal out and then soda ash. This made it worse. After reading a bunch of threads on this site, i did a aa treatment and it worked like a charm. I've been slowly raising up my chlorine level as instructed and the water is still crystal clear but i am starting to see very slight staining on the stairs. Maybe this is because i added the sequestrant prior to doing the aa treatment instead of after?
 
2lbs of that product with 0.26% copper by weight in 14,000gal only raises the copper ion level to 0.04ppm. That's too small to measure on any test and not typically enough to cause staining unless the pH is very high which, adding soda ash will do.

If the stains lift with ascorbic acid, those are typically iron stains but fresh copper stains can be lifted with AA as well. Either way, the sequestrant should be added AFTER the AA treatment in finished but BEFORE you start raising FC again for optimal results.
 
That first picture looks a lot like iron laden water. There's no way the copper in the shock product could cause what you're seeing but it is possible for water with iron in it to change into a clear green/brown color when you add lots of chlorine and soda ash.

Only very good test kits can measure iron when it's held in solution with a sequestrant so it may take an independent water analysis (i.e., NOT the pool store) to figure out how much iron you have.
 
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