Maxi-Jet®PH pump and power head is ideal for powering undergravel filters or creating internal water movement from its fully rotational output. The Maxi-Jet®PH incorporates a venturi aeration device to provide optimal aeration and gas exchange in the aquarium. A silencer keeps the venturi aeration device operating quietly. An adjustable air filter permits the user to fine-tune air volume and water mixing as desired. The intake tube adapter with prefilter screen prevents gravel or loose material in the aquarium from getting into the pump. Maxi-Jet®PH pump and power head includes an innovative triple-suction cup mount, an adjustable hook with cable guide, and a grid support for optional foam cartridge, and comes in a complete range of sizes.Features: High performance with low power consumption May be used externally or submerged Waterproof rotating water outlet Silent, versatile, low maintenance Protected motor will not overheat UL Approved Directional Flow Flap Can be connected to 5/8" Flexible TubingManufacturer Warranty: 2 years from date of purchaseSpecifications: V/Hz: 120V/60Hz Wattage: 8.5W Max Flow: 230gph Max Pumping Height: 46" Dimensions: 3.5" L x 2" W x 3.25" H