Asked in Swimming PoolsPool Care and Cleaning
Why does the water in your pool turn orange when you add chlorine?
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.