The AquaVita 4" x 2" Cylinder Air Stone delivers consistent oxygen diffusion to support healthy root development in hydroponic systems. This air stone works by connecting to an air pump and releasing air through its porous surface, creating fine bubbles that increase dissolved oxygen levels in nutrient solutions. Improved oxygenation helps promote stronger root growth, better nutrient... https://www.hydroponicstown.com/850003-aquavita-4-x-2-cylinder-air-stone