The Dymax IQ Skimmer is an air-driven skimmer that not only fits into the IQ5 but also most Nano Aquariums. The wooden airstone produces very fine bubbles that rise through the water and remove protein and fine suspended solids from the water. The waste foam produced can then be removed from the collection cup. This process is essential to remove dissolved organics frommarine aquariums that can quickly buildup to toxic levels to fish and invertebrates.