Coralife Turbo-Twist Ultraviolet Sterilizer removes free floating algae, parasites and harmful micro organisms from aquarium water. This unit features a unique twist flow design that increases water’s exposure to ultraviolet light improving the treatment of unwanted algae and microorganisms. It includes mounting brackets for hang-on or in-line application for an easy setup and easy installation. There's a indicator light to let you know when the sterilizer is operating. Uses Coralife UV Replacement Lamps. A water pump is needed and not included with the Turbo-Twist. Available in multiple sizes to accommodate a variety of aquarium sizes. Coralife is a trusted brand of marine aquarium parts and supplies. We offer aquarium lighting, filtration products, marine salt mix and more. When aquarium systems require more than just the basics - Coralife steps in. From the all-inclusive BioCube aquariums to a complete range of lighting and equipment, the Coralife brand is designed to meet the needs of the more advanced aquatic hobbyist. Features & details Removes free floating algae, parasites and harmful micro organisms from aquarium water Features a unique twist flow design increases water’s exposure to ultraviolet light improving the treatment of unwanted algae and microorganisms For fresh or saltwater applications Easy setup and installation, includes mounting brackets for hang-on or inline applications Indicator light lets you know when the sterilizer is operating Use Coralife UV Replacement Lamps Multiple sizes to accommodate a variety of aquarium sizes A water pump is needed (sold separately) Increased exposure to UV light from twist-flow design; uses replaceable 18W UV lamp. Recommended for aquariums up to 250 gallons