Floaters for releasing chemicals into swimming pools, namely, filters, water filtration and purification units for swimming pools and spas for industrial purification, pharmaceutical filtration, separation and clarification applications including chemicals, foods and beverages; filters for water purification and for reverse osmosis filtration units; filters for swimming pools and spas; filtration media or prefilters in the nature of non-woven fabric, filtration membranes or scrims for filteri...