FRP Sand Filter ( and Multimedia) made in Indonesia with German technology can be used for the filtration system of swimming pool, fish pond, water park, well water, etc. Combining this sand filter with UV Disinfection or AOP ( Advanced Oxidation Process) Ozone can be used as a package filtration system for " effluent polishing" of wastewater treatment plant using conventional activated sludge process and " permeate polishing" of drinking water treatment.