Suds-X is a highly concentrate rapid defoamer specially formulated for spa and hot tub water. Excellent for retarding and suppressing spa foam. Suds can be caused by many various substances, including shampoo or soap residues left on the hair or body. These build up and combine to produce a sudsing problem. Suds-X suppresses the sudsing properties of these residues fast, yet is entirely safe for even the most delicate and sensitive skin.