What's the feng shui about raising fish in cow trough?

If fish can influence the feng shui at home, it should be valuable since ancient times.

Since fish farming doesn't play much role in geomantic omen, what does it matter where it is kept?

I have read many ancient Feng Shui books, and none of them said that raising fish at home would affect Feng Shui.

Do you understand what the master said?