In traditional Chinese culture, fish symbolize abundance year after year, and many people keep a few fish at home for this auspicious meaning. Keeping ornamental fish is also quite popular nowadays. So, how many fish should you keep for good fortune? Let's find out below.
How many fish are most likely to thrive in a fish tank ?
Generally, the numbers 1, 4, 6, and 9 are considered the most auspicious. In Feng Shui, 1 and 6 represent water, while 4 and 9 represent metal; these numbers are believed to generate wealth, as they are associated with water. Other numbers are generally considered unfavorable.

What are the rules for keeping fish in an aquarium?
1. Fish tank location
Fish tanks are generally placed in four directions: North (Kan), East (Zhen), Southeast (Xun), and Southwest (Kun). These four directions are considered safe and auspicious, unlikely to bring misfortune, and are mostly believed to bring good fortune.
2. Fish tank size
Fish tanks should generally not be too large. Large tanks hold too much water, and while water is important in Feng Shui, too much is not advisable. Therefore, especially for beginners, it's best to choose small to medium-sized tanks, approximately 20 to 40 centimeters in diameter.

3. Fish tank shape
The shape of the fish tank should ideally not have sharp corners. It is especially taboo to make a fish tank in the shape of a triangle or fire, as this can easily lead to disputes, quarrels, and bloodshed. The best shapes are round, oval, or square, all of which are considered to bring wealth.
4. Aquarium height
A fish tank height of 60-130 cm is generally suitable, and it should not exceed the eye level of an adult. If the fish tank is too high, it will create a kind of negative energy called "drenching water," which will affect the feng shui and lead to poor fortune, blocked sources of income, and difficulties in making money for the family.