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 Aqua Comb $26.99 Add to cart Filter Clean $14.99 – $29.99 Select options Bio Ouster Restoration Plumbing Cleanse $49.95 Add to cart Bio Ouster Portable Hot Tub Watercare Kit $99.95 Add to cart