The right star is not the right star.
One of the Seven Stars of the Big Dipper (actually nine stars), it is also called the Nine Purple Star in Feng Shui. The number of the left palace of the Eight Diagrams is nine, the color is red (red, purple), and the five elements are fire. In the current Feng Shui In the eighth fortune, it is the energy of life (prosperity), belongs to the star of joy, and is the prosperous star for the next fortune (20 years starting from 2024). Is that detailed enough?
Your "fish farming has the right star", that is to say, the direction where the fish tank is placed with the nine stars is more auspicious.