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Usually this is the result of converting copper sulfate stains (turquoise) to cupric oxide (grey-black) by oxidation from the shock (calcium hypochlorite) sitting directly on the copper stains. Avoid this by shocking with liquid chlorine or pre-dissolving the granular shock so it doesn't sit right on the plaster. Often the grey-black stains can be reconstituted to turquoise sulfate by letting alum (aluminum sulfate) sit on the same spot. This has to be done relatively soon, though, before calcification covers the stains with a layer of carbonate that the alum can't soak through...

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2004-08-04 16:39:30
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Q: Why does the plaster in a pool seem to burn or turn black after adding shock treatment?
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When can you swim after adding algicide and shock?

A person can go swimming in a pool a few minutes after adding algae treatment and shock to the water. This is provided that a low dose was used. The manufacturers of the algae treatment recommend that a person waits 45 minutes to an hour to swim after adding a normal dose.

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An electric shock will stop the heart, treatment for this is CPR.

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about 6 hour after shock or sooner if you use a shock and swim

Which is not a part of the treatment for shock?

Many, many things are not part of the treatment for shock. The question needs rephrasing.

When was Shock Treatment - Edgar Winter album - created?

Shock Treatment - Edgar Winter album - was created in 1974-05.

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Adding a great amount of salt in a single step is a salt shock.

If you have a gunite pool that has been stained due to a shock treatment can this be reversed or will it have to be painted and what are your options?

Hum, what kind of shock treatment would stain your pool. What color is the stain. Brown? Not the treatment. Iron in water - should run filter for 12 hrs after refilling or toping off the pool and adding a treatment or chlorine. Your plastered pool most likely was not painted unless you know this for a fact. Plastered pool are not painted unless you are trying to hide something. The staining can only be removed by the process of a light acid wash of the plaster. Treat your pool with a sequestering agent or stain out product once in a while to prevent this in the future. Follow label instructions. k

Is shock treatment legal?

Yes, shock treatment (also known as electro-convulsive therapy) is legal and is still performed by psychiatrists.

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Various forms of treatment for shell shock have been tried. Psychotherapy and psychiatry are usually used nowadays. During and after World War I, electric shock treatment was sometimes used.

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Shell shock is mostly referred to as anxiety and post traumatic stress disorders. The treatment for this is regular psychiatry visits and possibly medication.

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