Fish tanks for raising small goldfish are usually made of glass, with round or square mouths available. One thing to note is that the size of the fish tank has a great relationship with the number of fish. Don’t keep multiple goldfish in a small fish tank with a round mouth, preferably no more than three. On the one hand, this is because space is limited, and on the other hand, there is a fear of quarrels if there are too many.
We usually use tap water to raise small goldfish, but we should be careful not to throw the fish directly in after changing the water every time. It is best to dry the water in the sun for a period of time to remove the chlorine from the tap water. It is best not to change the water completely, leaving about one-third of the original water.
