Generally speaking, the better quantity is one or nine. It is best not to leave two or three, these two figures are particularly unfavorable for making money. The location should be in the southwest, which is a financial position, but if this location has been dedicated to the god of wealth and so on, don't put any more fish tanks. Otherwise, it will be bad.
Fish species can be selected from koi fish, Mountain Blowing Gold, or Dante. One is the main wealth, the other is the prosperous wealth.