The Coralife BioCube Protein Skimmer now includes adjustable hanging clips for easy placement, an integrated air pump, and no longer needs an air stone. It effectively removes dissolved organics from saltwater for BioCubes and standard aquariums up to 32 gallons in size. This unit includes an adjustable air flow valve to control the velocity of skimming and easy to access removable collection cup for routine maintenance. It also features a self-priming pump making setup simple. This is a transition from part number 100115645