Apparatus and method for solar heating of water

A method for solar heating of a tank of water comprising the steps of positioning at least three substantially vertical, substantially planar plastic strips in spaced relationship in said water, such that said strips are substantially immersed in the water to be heated, with the proviso that said strips are light absorbent on both major planar surfaces, and exposing said strips to solar radiation.

A recreational swimming pool equipped with a solar heating apparatus comprising at least three substantially planar plastic strips removably positioned substantially vertically in spaced relationship in the pool water, such that and means for removably positioning said strips in spaced relationship in said pool water with the proviso that said strips are light absorbent on both major planar surfaces.

Apparatus for heating a recreational swimming pool comprising (i) a solar radiation trap consisting of at least three substantially vertical, substantially planar plastic strips in spaced relationship to one another, such that said strips are substantially immersed in the water to be heated, with the proviso that said strips must be light absorbent on both major planar surfaces and (ii) means for removably positioning said solar radiation trap in said pool with the proviso that said positioning means be or such construction so as to minimize absorption of solar radiation by the positioning means rather than by said strips.