The Marine Metal ABS-3 Bubble Donut 3″ Air Diffuser: Marine Metal ABS-3 Bubble Donut 3 inch ring-shape air diffuser that creates fine bubble curtain for maximum oxygen transfer.

Key Features

• Genuine Marine Metal Products: Industry-leading bait aerator brand keeps live bait alive longer for better fishing
• 3 inch donut/ring shape
• Creates fine bubble curtain (vs single-point air stones)
• Maximum oxygen transfer per air volume
• More efficient than basic air stones
• Drops to bottom of bait tank/livewell
• Replacement or upgrade for standard air stones

About Marine Metal Products

Marine Metal Products is the leading bait aerator brand for fishermen. Their Bubbles series of battery and AC powered air pumps is the standard for live bait management minnows, shiners, crawfish, leeches stay alive longer with proper oxygenation. The lineup spans tiny AA-powered Baby Bubbles for ice fishing minnow buckets through high-output 360 GPH 12V pumps for tournament livewells. Made in Florida.

Marine Metal Air Pump Selection Guide

• Power Source
• 110V AC (A-1, A-2): Wall outlet home tanks, bait shops, garage holding tanks. Continuous operation.
• 12V DC (FS-4, AHF-300, B-15, B-17): Boat battery tournament livewells, all-day fishing, no battery management.
• D-cell (B-16, B-17, B-3, B-11, B-14): Portable bank fishing, dock fishing, ice fishing. 12-24 hour battery life.
• 2 AA (B-18 Baby Bubbles): Compact small bait quantities, ice fishing minnow buckets.
• By Tank Size
• Small (1-5 gal): B-18 Baby Bubbles, B-11 Bubble Box.
• Medium (5-15 gal): B-16 Hush, B-3, A-1.
• Large (10-25 gal): B-15 Power, AHF-300 Floating, A-2.
• Tournament livewell (up to 30 gal): FS-4 Fish Saver.

Frequently Asked Questions

Why a donut shape?
Standard air stones release bubbles from a single point. Donut diffusers spread the bubble release across a wider ring finer bubbles, more total bubble surface area, better dissolved oxygen transfer. More efficient at the same air-pump output.

3″ vs 5″ donut?
3″ ABS-3: smaller bait tanks, single placement. 5″ ABS-5: larger tanks, more bubble coverage. Match diffuser size to tank size.

Why is bait oxygenation critical?
Live bait consumes oxygen rapidly in confined water minnows can deplete a bait bucket’s dissolved oxygen in 30-60 minutes without aeration. Air pumps continuously add oxygen, keeping bait alive for hours/days.

Air pump or water pump?
Different functions. Water pumps recirculate water (good for temperature regulation). Air pumps add dissolved oxygen (essential for bait survival). Tournament livewells often need BOTH.

Warranty?
Marine Metal standard manufacturer warranty against defects.

Warranty

Marine Metal standard warranty. Military and First Responders are encouraged to use credentials in the cart section before checking out.

Specifications