The water related ceramic balls (Loess, Tourmaline, Maekbanseok, Zeolite, Illite, Wongiseok, Gwiyangseok, Magnetite, Alkali ball, Antibacterial ball..) The ceramic balls formed at lower temperature (below 250) [activated carbon ball, Hanbang ball, low temperature tourmaline ball, strong Alkali ball, chlorine removal ball, sterilization ball]