Can you put two fish tanks in the living room of your home and one aquarium? A water box?

Absolutely. I have a straw tank and a tank dedicated to raising fish in my house. As long as the area is large enough, there is no problem with putting a few. As for the issue of Feng Shui, it is a matter of opinion to the wise. If you do, ask someone.

Two fish tanks should not be placed in the living room.

Don't make a fish tank too big in your living room: too big a fish tank will store too much water, and too much water will risk flooding. From the perspective of Feng Shui, water is important, but too much and too deep is not appropriate.

Of course, it depends on the size of your living room and your decoration.

If there are five elements at home, don't put it.

Of course you can, if you want to. Your living room, your way.

As long as you don't believe in feng shui, there is a place to put it casually.