Goldfish can grow up, of course, this is also related to the size, genes, feeding and normal life of goldfish. Goldfish can grow up to about 30 centimeters and have a lifespan of about 10 years. To make goldfish grow up healthily, you need to pay attention to the following four aspects.

1. Change the water frequently to ensure that there is enough dissolved oxygen in the water.

2. It is necessary to place the goldfish tank in a place where the sun can shine directly, or install an ultraviolet irradiation lamp in the goldfish tank, which can effectively kill the bacteria in the water.

3. Balanced nutrition, it is recommended to use regular fish feed, so that goldfish can be nutritionally balanced.

4. Living density, due to the limited living environment, how many goldfish to feed needs to be carefully considered.