The Marine Metal Bubble Donut Air Diffuser delivers steady, reliable aeration for live wells, bait buckets, and aquariums. Tough, weighted, and easy to use, it keeps bait and fish healthy in any setup. Provides consistent aeration for live bait systems Durable construction for long-lasting use Weighted design stays on the bottom Compatible with 12V, 110V, and D battery pumps Great for buckets, coolers, live wells, and tanks