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Swimming Pools
Pool Care and Cleaning

Why does the water in your pool turn orange when you add chlorine?

Answer

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Wiki User
July 13, 2009 5:32PM

The cause may be that the pool water was treated at some point with PHMB which comes in the brand manes Baquacil, Revacil, Soft Swim and others. There is a reaction between chlorine and "Biguanide" the active ingredient mentioned above. There are also water molds that come in and orange color and metals, notably iron can cause tinted water. Have your water tested for metals and add a sequestering or "chelating" agent if required.