Defender 32oz. $22.95 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 Bio Ouster Portable Hot Tub Watercare Kit $99.95 Add to cart Spa Up / pH Up 2 lbs $9.95 Add to cart Natural Chemistry Clean & Perfect $24.95 Add to cart FROG @Ease Floating System (for Spas) $54.95 Add to cart