Ultum Nature Systems DELTA Mini The UNS Delta Minisurface skimmer is a great piece of equipment for increasing filtration levels of canister filters or used as a substitute for smaller hang-on back filters for nano aquariums. The surface skimmer effectively removes surface film and increases important air exchange. The Delta Mini is suitable for freshwater, planted and marine/reef aquariums. This unit features easy installation and maintenance. Delta Mini is adjustable to accommodate changes in water level to ensure your surface stays clear from organic build-up and floating debris! Specifications: Color:White Recommended for:8-48G aquariums Power:3.5W Voltage:110V/60Hz Flow Rate:66G/H