Scumballs for Hot Tub Scum Absorber & Pool Spa Surface Cleaner | Reusable 3-inch Foam Ball Absorbs Oils, hot tub Sponge scum Absorber | Hot Tub Accessories Prevents Scum Lines & Filter Clogs | 4 PackBrand: SCUMBALL Features: Cleaner Soaks, Less Scrubbing: Enjoy crystal clear water without the elbow grease. Scumballs act as a spa scum remover by absorbing body oils, lotions, and debris before they stick to spa walls or pool liners. Trusted USA Patented Technology: Backed by over 20 years of innovation, Horizon's patented foam is specially engineered to absorb up to 40x its weight in oily residue, sunscreen, and scuma powerful hot tub oil absorber