One Scumbug oil-absorbing sponge absorbs an amazing 40 times its weight in oil and pollen. When placed in a clean pool or spa, the Scumbug improves filtration and helps to eliminate formation of a scum line. It will not get clogged in water lines. Simply place the Scumbug in your pool's skimmer (fits all) or free-float in your spa. When one side is scummy, flip it over. When saturated, squeeze out, clean and reuse. Under normal conditions, one Scumbug should last an average swimming season. 

2-pack