What is the white residue on my indoor fountain?
When water evaporates from a fountain, it leaves a white residue, primarily calcium deposits. It can be prevented by several methods. Distilled water leaves no residue because the minerals have already been taken out. Or you can add a scale remover to the water that will eliminate mineralization from occurring. Usually less than a teaspoon is needed for a gallon of water. We offer a product called Protec that works very well. Also, when refilling a fountain run your finger along the water line to break the water surface tension and loosen the mineralization at that point.