How many tropical fish are best to keep?

How many tropical fish should be kept depends on the species of fish and the size of the fish tank. Generally speaking, when raising small tropical fish, such as guppies, zebrafish, lantern fish, etc., they need to be in large numbers to be ornamental in groups. If the fish tank is large enough, it will look good if you keep dozens of them. If it is a large tropical fish, such as arowana, warship, catfish, etc., it is generally better to keep odd numbers, because odd numbers belong to yang and even numbers belong to yin. In Feng Shui, one and six represent water, and four and nine represent gold. This number is the most able to make money and generate water. If you want to analyze it in detail, it will be much more complicated. It also depends on the location of the fish tank, the type of fish, the color of the fish, etc.

For reference only.