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 Test Strips $14.99 Add to cart Scum Balls – 2 pack $14.99 Add to cart Bromine – Spa Dispenser $19.95 Add to cart Spa 56 – Chlorinating Granules $32.99 – $75.99 Select options