According to geomantic omen, the layout of the south mountain and the north water will make the south room feel cold, so it is suitable to place fish tanks in the southwest. In addition, the East belongs to aquatic wood, so fish tanks can also be placed in the East. In the living room, you can choose to put the fish tank near the southwest corner or east.
The above suggestions are for reference only, please adjust the position according to the actual situation.