Power Bubbles is a new 12V-DC aeration system that pumps two liters of air per minute while drawing only 1/4 amp. The unit offers a double discharge and the option of aerating one or two wells. The weighted Bubble Ring diffuser attaches to the air hose and remains at the bottom of the well. Dispersing maximum dissolved oxygen from any 12V or 110V air pump, it replaces the standard air stone. Marine Metal Products, Clearwater, FL; (800) 497-5575.