Swimming pool chlorinating apparatus in the nature of salt water chlorinators; a pool water cleaning and filtering unit that utilizes salt; swimming pool water filters; Swimming pool water cleaning and filtration units; filters, heaters and pumps sold in combination for use in swimming pools; chlorinators and salt chlorine generators for use in swimming pools; Water purifying machines and water treatment machines for swimming pools, spas, and hot tubs, namely, units that remove slime from wat...