JBJ'S NANOZAPP keeps your fresh or marine aquarium up to 30 gallons free of floating algae, parasites, and pathogens. Slim size makes it great for nano reefs and the Nano Cube! Quartz sleeve helps ensure 99% efficiency transmission of UV rays. 1/2" fittings. Includes 2 x 6" lengths of 1/2" tubing. Requires water pump, 225 gph max. Flow rate, 100 gph min., Sold separately.