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How do you remove bad stains from a gunite pool that has lost some of its smooth finish?
Wiki User
∙ 12y ago
this works only on marcite pools, lower pH first to 7.0 then lower chlorine to 0 ppm , shut off pump, springle citric acid about 4 lbs, let it settle to the bottom, let it sit 24 hrs with no movement, then turn on pump, shock with 1 gal chlorine and let it run 12 hrs then shock again 1 gal and brush away citric acid. Also bring your pH up slowly. This should elminate staining then be sure to use a metal out for future use.
Wiki User
∙ 12y ago
Wiki User
∙ 15y agoMetal stains on the marcite are caused either by rebar or some other form of iron. Well water often creates this problem because of a high iron content, and a pool heater can also be the cause. Use of a sequestering agent, available at any pool supply store (Adcock, Leslie's, etc.), can solve the well water problem. The rebar problem generally means it is time for new marcite or, perhaps, fiberglass. If a heater is involved, contact a pool service company and have them check the header and impellers. If they're iron, they will need tp be switched out.
Wiki User
∙ 9y agoMuriatic Acid will get rust stains out of a Gunite Pool. To prevent rust, it is recommended to keep pH level of the water slightly acidic.
Wiki User
∙ 15y agoPut a chlorine tablet or shock in an old sock and weight it to the stain. It should be gone in a few hours.
Wiki User
∙ 17y agoacid wash pool
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