A Complete System for Saltwater/Reef Environments Biocube HQI offers an aesthetically appealing design and high quality components that make reef-keeping easier and rewarding. The key component is the HQI metal halide light which provides the high intensity lumen output preferred by reef-keeping enthusiasts. Now you can create a thriving coral reef with a broad variety of organisms including small polyp stony (SPS) corals and Tridacna clams. Healthy reef-keeping also requires proper filtration and Biocube HQI has everything you need including a protein skimmer for removing harmful organic waste, a refugium chamber for establishing biological filtration and a replaceable filter cartridge to eliminate particulate matter. And don’t forget beauty. Since a thriving coral reef is a beautiful reef, Biocube HQI includes a clear glass canopy for showcasing your aquatic masterpiece. The canopy is easily removed for stocking, water changes, and ongoing maintenance. Other important features include: * Clear glass splash guard surrounding the U.V. shielded metal halide lamp * Powerful but quiet fan built into light fixture for active cooling * Light housing designed with small thermal vents so heat rises up and away from aquarium * Dimensions: 20.8in x 19in x 21in