The MDQ Series circulation pumps are meant for use in free-flowing marine and reef aquarium applications with direct tank return and wet/dry filtration equipment. The Little Giant ‘Quarium Series pumps come in versions with high-flow options for circulation, and pressure versions for use with canister filters & other applications. Made for aquariums but can be used for other indoor water circulation applications. Each motor is equipped with thermal protection, a 6’ power cord with a 115 V plug, and is designed for easy installation and maintenance.