CHEMICALS FOR SWIMMING POOLS AND SPAS, NAMELY, SILICON COATINGS FOR PROTECTING POOL AND SPA SURFACES, CLARIFIERS, PEROXIDE SHOCKS, CHELATING AGENTS, CHLORINE AND BROMINE REMOVERS, PH BALANCERS, STABILIZERS, AND SCENTED WATER CONDITIONERS; AND ENZYMES FOR CONTROLLING ALGAE FOR USE IN SWIMMING POOLS AND SPAS