The light in the fish tank is too strong. I don't know if covering it with cloth will affect Feng Shui.

I don't know where your fish tank is. If it is a financial position, you can brighten the fish tank, which is of great help to the fortune. Of course, if you put it in a fierce position, everything at home will be unhappy. For example, if you put it in a sick position, it will always make your family sick. If put in the position of a villain, people will always meet a villain.