Devours Scum, Slime, & Grime From Softub and SplashTub Spas and Pools. Absorbs 40 times its weight in body oils and suntan lotions. Also loves pollen. 300% more surface area than the "Ball" and will not get clogged in the water lines. Place Scumbug in the Softub and let it float. When one side is scummy, flip over...when saturated, squeeze out, clean and reuse. Improves filtration and when placed in clean Softub, Scumbug helps to eliminate the formation of a scum line. Under normal conditions, Scumbug should last an average of 3 months, depending on how active your Softub is.