A stain on the wall or floor of a swimming pool is either caused by metals in the pool water, or by something organic. The best clue to the source of the problem is the color of the pool stain. Stains on the walls or floor of a pool that are a greenish brown color are typically related to something organic, such as leaves sitting on the floor of the pool during the winter, or algae. A simple shock treatment and scrubbing with a stiff brush may quickly remove the stain. If brushing or scrubbing does not remove or lighten the stain, a natural ascorbic acid based product or diphosphonic acid based pool stain remover should be used. If a pool stain appears at the water line of the swimming pool you may use the appropriate tile or vinyl cleaner to gently scrub the stain away, or you might try one of the many very effective enzyme based cleaners. All natural pool enzymes will eat away at the oils holding dirt on the surface of the pool at the water line, to remove the stain with little or no scrubbing.

Stains that appear reddish brown or very dark colors are typically related to the metals in your pool water. The metals that commonly cause pool stains are iron, manganese & copper. A guide to the color of pool stain resulting from each of these metals is included below. If a swimmer