How about a fish tank by the bed?

No, it's not good for feng shui. People rely on the mountain, which is the wall. If there is water, it is not relying on the mountain, but relying on water. Water will make you spend money like water. From a scientific point of view, it is easy to get rheumatism if you are not good for your health. Psychologically speaking, if the child's bedside is not against the wall, the child will feel insecure when he grows up!