Patent ID: 7763178

Claim:
A method of forming a film or monomolecular, non-toxic, biodegradable surface layer film for swimming pools, spas, hot tubs or water ponds in order to prevent evaporation, limit heat loss, and maintain chemical balance comprising: forming a dispensing container having a volume of between 0.1 and less than 24 cubic inches, said dispensing container being resistant to attack by water and chemical, said dispensing container perforated by a plurality of small holes, each of less than three square mm in cross section and greater than 5,000ths of an inch in diameter, and with an aggregate area of said holes less than 0.2% of the surface area of said dispensing container, said dispensing container being spherical in shape and having neutral buoyancy dependant upon water velocity flow so as to cause said dispensing container to move about freely and roll on the surface of the water, said dispensing container having a chamber of sufficient size to contain a solution for forming said monomolecular, biodegradable surface layer film; forming a solution of deionized water, propylene glycol, methyl paraben, poly-oxy-ethylene sorbitan monolaurate, cetyl alcohol, sorbitan monopalmitate, cetyl ether, antifoaming agent, and propyl paraben, and introducing said solution into said dispensing container and sealing same; puncturing said plurality of small holes in said dispensing container; positioning said dispensing container in said swimming pool, hot tub, spa, or water pond so as to move freely under the influence of said water velocity and to dispense said solution, forming said film or monomolecular, biodegradable surface layer film on said surface of said swimming pool, hot tub, spa or water pond so as to prevent evaporation, heat loss and to maintain chemical balance.