Why does water on my shower curtain and tile grout look pink?

People sometimes see a pink film develop on the flat surfaces of their shower, in their pet’s water bowls, or in toilets that are not used frequently. This is a colored organism that is present in the air. It is a harmless bacterium and exists in moist/humid conditions. The customer can remove the pink film by cleaning the area periodically with a commercial cleaning product that contains bleach. Where possible, keep the area clean and dry to discourage the spores from growing back. Permanent staining can occur if the area is not cleaned regularly.