Marineland Maxi-Jet Multi-Use Water Pump

The Marineland Maxi-Jet is a long-running multi-use pump that can work as a power head, a utility pump or, with its conversion kit, a prop-style circulation pump. Marineland sells it in four sizes, and this page covers the Maxi-Jet 400 and the Maxi-Jet 600.

The four sizes

• Maxi-Jet 400: 110 to 500 GPH
• Maxi-Jet 600: 160 to 750 GPH
• Maxi-Jet 900: 230 to 1000 GPH
• Maxi-Jet 1200: 295 to 1300 GPH

The lower figure is the flow as a standard pump; the higher figure applies after conversion to a circulation pump, which moves water in a broad, low-pressure stream.

Three jobs in one

As a power head, it sits on top of an undergravel filter uplift tube and pulls water down through the gravel. As a utility pump, it can feed a protein skimmer, a calcium reactor or a refugium. As a circulation pump, the conversion kit turns it into a prop-style unit that stirs the main tank.

Venturi aeration

A venturi fitting draws in air and mixes it into the outflow. The aeration is fully adjustable, so you can add oxygen in a warm tank or turn it off to avoid microbubbles in a reef display.

Who it suits

Keepers who like to repurpose gear will get the most from it. One pump can drive an undergravel plate in a starter tank, then move to a sump or reactor later. Reef keepers often keep one as a spare for emergencies.

Care

Pull the impeller every month or two and rinse out slime and snails. A clean impeller keeps the flow close to its rating and reduces noise.

For a modern, simple circulation option, compare the AQUANEAT 480 GPH wavemaker.

Because parts are widely stocked, worn impellers and conversion kits are simple to replace, which helps a single pump stay in service for many years in a busy fish room.