Film on my vinyl liner and brown steps

JohnT

Admin
Mod Squad
TFP Expert
Apr 4, 2007
9,536
SW Indiana
Looks like iron staining. Get a bottle of vitamin C pills and place one on the step. You should see almost immediate lightening in a much larger area than you might expect. If it lightens it, that conforms iron staining and you will want to do the same thing on a larger scale with an ascorbic acid treatment Ascorbic Treatment to rid Pool of metal stains then use a sequestration regularly to prevent staining.
 

justinc

Gold Supporter
Apr 3, 2019
585
Texas


 

YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
10,586
Evans, Georgia
Get the Vitamin C.... know for sure what you're dealing with. The eraser is just removing the evidence of the problem, but doesn't give you the diagnosis.

Maddie :flower:
 

justinc

Gold Supporter
Apr 3, 2019
585
Texas
Ascorbic acid removes the stains and places them back into the water. You must then continue to use a sequestrant to keep the metals from falling back out of solution and turning to solids that stain your pool surface.

Ascorbic acid lifts the stains.

Sequestrants keep the stains lifted.

The only way to remove the metal from the water is to exchange it. You must keep using sequestrants as they eventually get destroyed by the chlorine/degrade over time and thus need to be replaced to keep the metal from turning back into a solid and staining your surface.
 
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