The first is the choice of fish tank. The shape of the fish tank is also very particular, generally rectangular, hexagonal and round. The second is to pay attention to quantity. Master's numerology should match the number of fish, so as to make money. For example, raising arhat fish, with its own quantity, combined with the owner's own numerology is the best choice. Then the color of fish can't be ignored. It is best to raise white, gold and snakehead fish in fish farming. They are the most prosperous.