Johnson Pump cartridge aerator pumps offer the ease of convenience and years of reliable service. Improved design with easy-to-install Dura-Port discharge port. Smaller profiles to fit in more confined spaces. Easy to change motor cartridge.• Type: Aerator• Voltage Rating: 12 Volt• Flow Rate: 1000 Gallon Per Hour Water-Cooled Motor For Long Service Intervals Improved Design With Easy-To-Install Dura-Port Discharge Ports Eliminate Stress Cracking Caused By Over-Tightened Hose Clamps Meets The International Standard, ISO 8849 Marine | Livewell / Baitwell Pump, Cartridge Aerator Pump