Can I raise fish because my five elements belong to fire?

You can raise fish, but even numbers are better. If the fish tank is bigger and placed in a ventilated room, you can change it to feng shui. The five elements belong to fire, but if the five elements are short of water, it is a good choice to raise fish, and it is also helpful for your work and study. By the way, remember to use a circulating water device when raising fish, which is good for feng shui, and living water also means flowing water.