The Vertex Air XL4™ pond aerator is a super-efficient, affordable and safe system. A Brookwood™ SafeStart™ compressor, housed in our rustproof aluminum outdoor cabinet, feeds bottom mounted CoActive AirStation(s)™ 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 2-year warranty plus a limited lifetime warranty against rust and corrosion on the cabinet, 5-year warranty on the AirStations™ and a 15-year warranty on BottomLine™ supply tubing.