If you go to the aquarium market, you will find that almost no merchant will have a jar of koi fish for sale. Many people think that cold-water fish are hard to raise and easy to die, but koi fish is an exception. Although koi fish is also a cold-water fish, it is relatively easy to raise. As long as the water can be raised well, it will be very easy to raise koi fish. Koi fish is more beautiful and has a good meaning. If raised well, it can also improve feng shui.
The second kind: fighting fish
Betta is really beautiful. They are gorgeous in appearance and uninhibited in character, and basically have no special requirements for water quality. They are easy to use. Thai fighting fish is beautiful, but China fighting fish is not to be outdone. In recent years, China Betta has risen rapidly in the aquarium market and has a large number of followers. Betta fish is not very demanding on water tanks, and small tanks can also be raised.