Aquarium filtration apparatus; aquarium heaters; aquarium lights; feed water heaters; filtering units for use in aquatic environments, namely aquariums, tanks, swimming pools, spas, hot tubs, whirlpools, baths, ponds, lakes, lagoons, harbors, and naturally occurring bodies of water; filters made of fiber for water filtration; filters, heaters and pumps sold in combination for use in aquatic environments, namely aquariums, tanks, swimming pools, spas, hot tubs, whirlpools, baths, ponds, lakes, lagoons, harbors, and naturally occurring bodies of water; fixtures for incandescent light bulbs; gas water heaters; heat exchangers not being parts of machines; heat pumps; heating systems composed primarily of tubes, pipes and pre-assembled manifolds though which cold or low temperature water circulates; hot water heaters; hot water tanks; industrial-water purifying apparatus; lamp whose light can be turned in all directions; light bulbs; light diffusers; mixer faucets for water pipes; oxygen generator for processing water by increasing oxygen content in the water; ozone sanitizers for air and water; regulating accessories for water supply, namely metered valves; swimming pool water cleaning and filtering units; water conditioning units; water filtering units for domestic, commercial, and industrial use; water filtering units for aquariums; water filters; water heaters for domestic, commercial and industrial use; water ionizers; water jets for use in aquatic environments, namely aquariums, tanks, swimming pools, spas, hot tubs, whirlpools, baths, ponds, lakes, lagoons, harbors, and naturally occurring bodies of water; water purification tanks; water purification units; water purifiers; water softening units; water treatment equipment, namely, cartridge filtration units, chemical sterilization units, reverse osmosis filtration units, and ultraviolet sterilization units; water chillers; water purifying apparatus, namely, foam fractionation units; water heating, chilling, pumping, recirculating, cleaning, filtering, purifying, sterilizing, and water purifying apparatus, namely, foam fractionation units, and their controllers, sold individually or as complete systems for use in aquatic environments, namely aquariums, tanks, swimming pools, spas, hot tubs, whirlpools, baths, ponds, lakes, lagoons, harbors, and naturally occurring bodies of water