I can't. Since the effective time of Magic Magnetic Treasure is 12 hours, after 12 hours, Magic Magnetic Treasure can be directly filled into the filter tank and cannot be reused. If you use enough magnetic treasure, you can't change water for half a year. Magic magnetic treasure is a kind of filter material product with particularly strong adsorption capacity. Can be put into a fish tank to remove peculiar smell, balance the PH value, and effectively solve the problems of turbid water and incorrect water color.