Scum Balls – 2 pack View cart “Defender 32oz.” has been added to your cart. $14.99 Add to cart Add to Wishlist Category: Spa Chemicals Related products Defender 32oz. $24.99 Add to cart Aqua Comb $26.99 Add to cart FROG @Ease 3-Pack Replacements (for Spas) $54.99 Add to cart Bright & Clear 32oz. $21.99 Add to cart