The NSK 70 DC Pro Nano Protein Skimmer is a compact yet powerful filtration device designed specifically for saltwater aquariums. It efficiently removes organic waste compounds from the water column, preventing their breakdown into harmful nitrates and phosphates, thereby maintaining pristine water quality for corals and fish. This hang-on-back skimmer is ideal for nano and medium-sized reef tanks where space is often limited, offering robust performance in a minimal footprint. Equipped with a variable speed DC pump and a needlewheel rotor, the skimmer allows for precise control over its operation, adapting to the unique needs of your tank's bioload. Its compact dimensions of 3.74 inches L x 3.94 inches W x 12 inches H make it suitable for many all-in-one aquariums, with an adjustable mount for optimal placement at a recommended water level of 6-8 inches. Maintenance is simplified by an easily detachable collection cup and skimmer body, ensuring quick cleaning without full removal. It includes an in-line pump controller and power supply. This protein skimmer is best suited for saltwater aquarists with tanks ranging from 20 to 50 gallons, depending on bioload, specifically targeting those with light (up to 50 gallons), medium (up to 35 gallons), or heavy (up to 20 gallons) bioloads. Its adjustable features and compact design make it an excellent choice for hobbyists seeking reliable, high-performance filtration in smaller setups, ensuring a healthy and stable environment for their delicate reef inhabitants. It's a must-have for maintaining crystal-clear water and supporting thriving coral growth in nano and medium reef systems.