Can I raise fish directly with tap water?

Tap water cannot be directly used to raise fish.

Tap water contains residual chlorine, which will cause some fish to feel uncomfortable due to lack of oxygen. If you need to use tap water to raise fish, you can put tap water in the air for a period of time to let the residual chlorine in the water evaporate in the air, and then use it to raise fish.

Because there is a cup-shaped cell on the skin of fish, it continuously secretes mucus, which reduces the friction of fish swimming in water. At the same time, mucus can protect fish from parasites, molds, bacteria and other tiny organisms, and make the skin have normal permeability.