Aquarium filter cartridges; Fibrous filtering media for general industrial use in the purification of air and industrial fluids; Filters, heaters and pumps sold in combination for use in swimming pools; Industrial waste water purification plants; Swimming pool chlorinating apparatus; Swimming pool filters; Swimming pool water cleaning and filtering units; Water filtration and purification units and replacement cartridges and filters therefor; Water purification filters; Water purification, sedimentation and filtration apparatus for clarification, thickening and filtration of water, waste water and industrial water
Environmental Control Apparatus