Defender 32oz. View cart “Scum Balls – 2 pack” has been added to your cart. $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 FROG @Ease 3-Pack Replacements (for Spas) $54.99 Add to cart Jet Clean 16oz. $14.99 Add to cart Bromine – Spa Dispenser $19.95 Add to cart Filter Clean $14.99 – $29.99 Select options