1 Super absorption capacity: The weight of absorbed oil, slime, residue and other types of slag is about 40 times its weight, but it does not absorb moisture. 2 The sponge helps reduce the load on the filtration system and filter by absorbing scum and emulsion / oil, thereby maximizing its service life, minimizing maintenance costs and saving you time. 3 Simply throw in the oil-absorbing sponge and let the filter pump run for a while to make it float freely (occasional turning) to complete the cleaning of the pool. 4 Oil-absorbing sponge helps eliminate inanimate debris in swimming pools, whirlpools, jet baths, massage baths and spas. 5 Includes 16pcs oil absorbing sponges.16 * oil absorbing sponges