This is a common household fish tank placement design. First, if you don't open the door, you will see the fish tank. According to Feng Shui, this is called "the array of broken wealth". Fish and water are wealth, so you can't go out and come back. Generally, it is staggered across the door, or at right angles to the door, and the fish tank is the porch (also the worst policy). Although this is a superstitious statement, it also has some truth. The fish tank is facing the door, and the impact and sound of opening and closing the door will keep the fish in a state of shock. Under the long-term action of water and sound waves (fish shops are all sliding doors), it will lead to structural fatigue, reduced stress intensity and increased risk of damage.
Secondly, from the picture, the indoor lighting is not high, and the fish tank is not suitable to be placed in a dark place, which is not convenient to watch and is not conducive to the health of fish and people.
You can consider the yellow place, position and width in the picture just right.
I hope the answer can help you, please adopt it.