Defender 32oz. $24.99 Add to cart Add to Wishlist Category: Spa Chemicals Description Description A concentrated formula developed to help prevent scale formation, use weekly for continued protection. Related products Spa Up / pH Up 2 lbs $14.99 Add to cart Natural Chemistry Clean & Perfect $24.95 Add to cart Renew – Spa Shock $32.99 – $75.99 Select options Metal Gon & Defender 2 Pack 16oz. $29.99 Add to cart