Key Features Space saving design Professional easy to use system with adjustable Flow control Includes ceramic media and spray bar Double filtration with internal biological cycle Calibrated rotor siting to prevent vibration and noise The Eden External Filter 501 comes with the benefits of being a safe, compact and small-sized filter unit which performs to highest professional standard of water filtration with almost silent operation. The motor is completely sealed and thermal-protected ensuring reliability and lower power consumption. Water is pumped though the internal multi-chamber filtering system including its very effective biological stage, resulting in crystal clear water returning to the tank. The 501 is a professional canister filter, suitable for both fresh and salt water tanks. Supplied with complete intake systems, hoses and connecting elbows with a spray bar, which provides for a better oxygen exchange at the water surface or with a flow deflector to adjust water