Attwood Tsunami Mk2 500 Aerator - Reliable Livewell Waterflow

Our review of the Attwood Tsunami Mk2 500 Aerator looks at whether this compact 12V aerator is worth fitting to a small boat livewell. The bottom line: it is for anglers and boat owners who need a straightforward, easy-to-service pump that pushes plenty of oxygenated water through a livewell. The single biggest reason to buy is its combination of flexible installation and a serviceable motor cartridge that makes maintenance quick, so users who value uptime and simple repairs will appreciate it.

Key Features

• Flow Capacity: Moves up to 1200 GPH to keep livewell water circulating and fish active for longer trips.
• Flexible Installation: Includes both 90 and straight inlet and outlet options so it can adapt to tight or standard thru-hull layouts without sealant.
• Serviceability: The single-handed motor cartridge with improved grip speeds routine servicing and replacement in the field.
• Backwards Compatibility: Accepts previous Tsunami bilge and aerator cartridges, reducing upgrade cost for existing owners.
• Thru-Hull Application: Designed for thru-hull installation with a straight inlet option sized for typical livewell plumbing.

Who It's For

This aerator is well suited to recreational anglers, tournament anglers on a budget, and small-boat owners who want a reliable livewell circulation solution that is easy to install and maintain. The 1200 GPH flow is best for small to medium livewells where constant turnover and oxygenation matter.

Those with very large custom livewell systems or who need adjustable flow control on the fly should consider higher-capacity or variable-speed alternatives. Also, if a non-thru-hull installation is required, confirm compatibility before buying.

Pros & Cons

Pros

• Easy installation options with both straight and 90 fittings for flexible routing.
• Good value and perceived build quality make it attractive for routine use.
• Single-handed motor cartridge simplifies maintenance and reduces downtime.
• Backwards compatibility lowers upgrade cost for owners of earlier Tsunami units.

Cons

• Some users report mixed pumping results, so actual flow may vary with install conditions.
• No built-in variable flow control, so fine tuning requires plumbing adjustments or external controls.

Specifications

Our Verdict

The Attwood Tsunami Mk2 500 is a sensible buy for anglers who need a no-nonsense livewell aerator that balances flow, ease of installation, and fast serviceability. It delivers solid value for most small to medium livewells and the backwards compatibility plus single-handed cartridge access make it especially practical for users who want low maintenance and easy upgrades.

Frequently Asked Questions

Is this aerator easy to service?
Yes - the true single-handed motor cartridge with improved grip makes servicing or replacing the motor fast and simple.

Will it work for my livewell?
The 1200 GPH flow suits small to medium livewells; check thru-hull size and routing since flow can vary with installation.

Does it require sealant for installation?
No - the design supports straight and 90 fittings without the need for additional sealant in typical installations.