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I want to know why there is pink growth on bathroom fixtures. (Utilities - Water Treatment)
The pink growth or stain is the result of a mold or a bacterium, specifically, Serratia Marcescens. The mold is present in the air. Mold and bacteria grow wherever there is a warm, moist, or humid environment, like a tub or showerhead. The mold and bacteria feed on the small quanitities of nutrients in the water.
Regular cleaning with bleach or a cleaner that removes mildew will clear the mold. Wipe away standing water to reduce growth. Certain materials, like rubber, plastic gaskets, etc., contain nutrients that help these organisms grow.
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