1. The fish tank should not be too high or too low. The height of the fish tank should be calculated based on normal adults. The height should not be lower than the abdomen and the height should not be higher than the chest. If it is too low and lacks the promotion of spiritual energy, it is easy to suffer from foot diseases. If it is too high, it will violate the feng shui taboo of "showing the head and causing evil". 2. The fish tank should not be too large. The size of the fish tank should match the size of the actual living room. If it is too large, it will not only fail to gather Qi, but will absorb the Qi and increase the moisture, which will affect your health. 3. Avoid facing the stove. The stove belongs to fire and the fish tank belongs to water. Water and fire should not be in opposition. 4. It should not be placed under the altar, and it should also avoid being in a straight line with the altar. 5. The fish tank should not be placed in the bedroom. The resting place in the bedroom should be quiet and should not be moved. In addition, the fish tank increases the humidity in the bedroom, which is detrimental to human health. 6. The fish tank should not be placed where it is sitting. It is said that the people in the mountain manage the wealth while the water manages the wealth. Placing the fish tank next to the seat is a taboo for going up the mountain and entering the water.