1 first of all, we need to change the tap water of goldfish in the fish tank for at least 3 days! This is to discharge chlorine and unnecessary substances from the water, make the water closer to the water temperature, and the conditions can make the water dry.

2, prepare straws, straws should not be too long and too thick.

3. Prepare a separate empty container to store the change water.

4, put the pitcher higher, put the other end of the straw in, let two-thirds of the straw filled with water (pre-filled with water or from the mouth), and then put it into the replacement water container.

Try not to change more than half of the water, which will make the fish better adapt to the new environment.

Finally, we fill the container with excess water for next use.