Feng shui fish is an ornamental fish, and its actual value is exaggerated by laymen. In fact, it has little effect on Feng Shui.
What affects Feng Shui is the external environment. If it's really bad, your feng shui fish can't play a role, because the role is very small. If the feng shui environment outside your house is ok, is your feng shui fish ok?
The answer is not necessarily, because you have too few feng shui fish, and the anger they can generate is not enough to affect your family. What else is there?
You can't keep it at home, because such a large amount can only be kept outdoors. If it is indoors, the home becomes a small fish pond. So many fish can produce anger that almost everyone needs and affect luck.