A soft, flexible, solar pool heater for floating on water generally
comprises independently inflatable outer ring and central portion. When
chamber and cavity are inflated, the cavity is with the top and bottom
planes of the ring. The ring can be inflated with water for holding the
heater in a pool in winds. Holes through the central portion permit
egress of air from under the central portion when the heater is placed on
water. Valves for chamber and cavity are located near one edge such that
the heater may be deflated by rolling from an edge opposite the valves.
Magnets on the ring condition water and attach to similar floating
heaters to form rafts.