Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Aquarium filters; Baths, bathtubs, whirlpool baths and bath installations; Electrolytic water generators for electrically decomposing tap water to generate electrolytic water and for removing chlorine odor from tap water; Filters, heaters and pumps sold in combination for use in hot tubs; Spas in the nature of heated pools; Swimming pool chlorinating apparatus; Swimming pool water cleaning and filteri...