The IceCap K3 100 HOB is a compact hang-on-back protein skimmer designed for efficient waste removal in saltwater aquariums up to 140 gallons. Its slim body requires minimal space behind the aquarium, making it an ideal filtration solution for tanks without a sump. The skimmer utilizes an externally mounted pump, which significantly reduces heat transfer to the aquarium water, helping to maintain stable temperatures and a healthier reef environment.

Constructed from high-quality acrylic, this skimmer is built for durability and long-term performance. It is powered by the controllable and quiet DCAIR 1.0 pinwheel pump, which consumes only 10 watts of power while producing an optimal mix of air and water for maximum waste extraction. With a footprint of just 8.8 by 3.5 inches, an impressive air draw of 500 lph, and a water draw of approximately 185.5 gph, it delivers powerful performance in a remarkably low-profile design.

This protein skimmer is best suited for aquarists seeking high-performance filtration for a sump-less aquarium system. It is rated to handle a heavy bioload in a 60-gallon tank, a medium bioload in an 80-gallon tank, or a light bioload in a 140-gallon tank. The combination of its space-saving external pump design, quiet operation, and efficient waste removal makes it an excellent choice for reefkeepers who want to maintain pristine water quality without the complexity of a full sump system.