Oilinator PSM1UNIT Pool & Spa Saver Mouse, A Pool Scum Remover NOT ANOTHER SPONGE PRODUCT, NOT STUFFED WITH FOAM, instead it packs a powerful absorbent formula inside Picks up body oil, sun tan oil, tanning lotion, sunscreen, scum, any sheenYOU NAME IT NO HARMFUL CHEMICALS, 100% recycled eco-friendly sorbent Can be used simultaneously with enzymes, BUT CAN DO THE SAME WORK ALONE AND LAST UP TO 3 MONTHS, extending filter life and service intervals Easy to use - just use included twisty to tie to skimmer basket bottom