Geomantic omen problem of residential fish farming.

The fish tank should not be too big; A fish tank that is too big will store too much water. From the perspective of geomantic omen, water is important, but too much and too deep is not appropriate. However, the fish tank is too high above the eyes when the adults stand up. So the fish tank in the living room should not be too big or too high, especially in the small living room.