Abstract: A stackable solar pool heater is formed of a semi-rigid self-cleaning centrally raised aerodynamically response membrane which membrane includes a depending integral perimeter. Flotation elements, providing a flotation ratio of approximately two to one, are secured periodically about the perimeter to maintain the perimeter partially submerged and the main body of the membrane raised above the water surface. A centrally located aperture is disposed in the membrane to equalize the pressure internal to the membrane with ambient and reduce the pressure therein in response to the low pressure extant the central part of the membrane created by the wind blowing across the raised surface of the membrane.