1. From the perspective of geomantic omen, it's okay to put a small fish tank in a single bedroom, but if it's a couple's bedroom, it's best not to put a fish tank. The fish tank should be in the living room. Putting it in the bedroom will cause the bedroom to become too wet and cold, and there should be a warm feeling between husband and wife. In the long run, it may be harmful to the relationship between husband and wife. Especially those bedrooms that can't get sunshine are cold, so don't put fish tanks in the bedroom any more.
2. It is best not to put fish at the bedside of the bedroom. According to the traditional knowledge of Feng Shui in China, the position of the heart is the key part of the human body, which belongs to fire and the fish tank belongs to water, so water can restrain fire. If the fish tank is higher than the heart, it will do great harm to the human body. On the other hand, if the fish tank is put too high, it will be unstable and form shower water, which is also very bad for family members.