The Vertex Air 4 pond aerator is a super-efficient, affordable and safe system. In a typical pond with 8 foot depths, an Air 4 can aerate approximately 4-6 acres depending on shape, slope, oxygen demand and other factors. Two1/3 hp Brookwood SafeStart compressors, housed in our rustproof aluminum outdoor cabinet, feed four bottom mounted CoActive AirStations utilizing Vertex’s MicronBubble technology. The rising force of millions of bubbles circulates the entire water column, entraining bottom water up to the surface allowing vital oxygen to be absorbed and poisonous gasses expelled. With no electricity in the water, Vertex’s aeration systems are safe for any type of water recreation. Our systems have a full two-year warranty plus a five-year warranty against rust and corrosion on the cabinet, five-year warranty on the AirStations and a 15-year warranty on BottomLine supply tubing.