Defender 32oz. Please choose product options by visiting Filter Clean. $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 Metal Gon & Defender 2 Pack 16oz. $29.99 Add to cart Mineral Purifier Spa Frog $41.99 Add to cart Metal Gon 16oz $14.99 Add to cart Bio Ouster Portable Hot Tub Watercare Kit $99.95 Add to cart