Concentrated, biodegradable foam dispersant quickly eliminates unsightly foaming, prevents foam from starting and accumulating, will not clog filters; does not contain oils. Add a small amount, (1/2-1 ounce) of Defoamer to the foaming areas of the water. Foaming– aeration from therapy jets can increase the foaming in a spa. However, if contaminants are allowed to concentrate, foaming similar to dish soap or laundry detergent will occur. These contaminants are very undesirable. Oxidation treatments, water clarifiers, water replacement, or cleaning of the basin and filter may be justified.