... which can directly used for running water,sewage water ,dringking water and swimming pool water treatment and so on .2,CHYS-series Integrate ozone ... 2B-12, CHYS-2B-24, and so on. "CHYS" means water ozone machine,"2" means water treatment capacity, and it can be adjusted ... CHYS-2C-12,CHYS-2C-24, and so on, "CHYS" means water ozone machine, "2"means water treatment capacity(just like above)."C" means ...