Can I put copper coins at the bottom of the sand drain?

Put a copper coin in the feng shui well, which represents wealth and wealth. Put it in a silver bag, or put coins of 138 yuan (once in a lifetime) as the meaning of getting rich. Feng shui wells should not be damaged or defiled, nor should they be placed near sewage ditches or ditches, otherwise it will destroy Feng Shui and the good Feng Shui of wealth, which is not conducive to the wealth at home.