+3 Bubble Donut 3" Air Diffuser ABS-3 $4.99 In stock Quantity: 1 Add to Bag Product Details - This 3" Bubble Donut Air Diffuser is a great way to properly aerate your bait tank or home aquarium. - It creates a circle of bubbles that helps keep healthy fish. - Designed to operate with all "D" battery, 12 volt and 110 volt air pumps. - Made for minnow buckets, coolers and livewells Save this product for later Favorite