T-H Marine Oxygenator Pro 12V Livewell Oxygen Generator

The T-H Marine Oxygenator Pro adds oxygen to a freshwater livewell without relying on a separate air-bubble pump. Its flush-mounted emitter uses electrolysis to release oxygen into the water, helping maintain a healthier environment for fish held between catches. The unit is designed to retrofit many 10- to 20-gallon livewells and baitwells. It runs from the boat’s existing 12V DC electrical system.

The Oxygenator draws less than one amp in operation and has a 3.375-inch-diameter emitter. Water contact activates the unit automatically, so normal use does not require a separate on/off action at the emitter. T-H Marine backs the unit with a three-year warranty and supplies installation instructions with it. The manufacturer cites testing showing improved fish survival in oxygen-enriched livewells, although actual results depend on water conditions and fish handling.

• 12V DC operation with less than 1-amp draw
• Flush-mount emitter for 10- to 20-gallon livewells
• Automatically activates when contacted by water
• 3.375-inch emitter diameter
• Freshwater use; dedicated switch and 3-amp fuse specified

Freshwater use is an important limitation: T-H Marine does not recommend this model for saltwater. The manufacturer also specifies wiring through a dedicated switch with a 3-amp inline fuse, even though the emitter activates automatically when submerged. This distinction is worth observing when planning an installation around the boat’s electrical system. Browse more livewell and baitwell equipment for related fish-care components.