How Big Can a Fantail Goldfish Grow in a Year? A Detailed Guide to Its Growth Rate

The fantail goldfish is a common ornamental fish in everyday life and is very easy to keep, so many people like to keep a few at home. So how big can a fantail goldfish grow in a year?

1. How big can a fantail goldfish grow in a year?

How big a fantail goldfish can grow in a year is related to the size of the tank and keeping techniques. Generally, the larger the water surface and the better the care, the faster the fish grows. Usually it can grow to about 20cm, and individual fantail goldfish kept well in a pond can reach a body length of 30cm, or even 40-45cm.

2. How do you keep fantail goldfish?

1. Density: The stocking density for fantail goldfish should be low rather than high. Usually, adult fish with a body length over 8 cm should not be kept in a small glass tank; instead, they need to be kept in a large glass tank or a ceramic tank, equipped with a small oxygenator to prevent oxygen deficiency.

2. Feeding: Feed fantail goldfish nutritious animal-based food (water fleas, earthworms) and white sesame seeds, etc. Do not feed them the poor-quality fantail goldfish food bought from stores. Feeding is generally done once each morning and afternoon, and they should not be overfed; feed only until the food is finished.

3. Light: When keeping fantail goldfish, it is best to place the tank in a spot that gets 1-2 hours of sunlight. This uses the ultraviolet rays of sunlight to sterilize and help prevent disease, and at the same time, due to photosynthesis, the fish's body color is also more vivid and beautiful.

4. Water changes: Frequently changing the water for fantail goldfish can increase the dissolved oxygen in the water. When changing the water, only one-third to one-quarter should be replaced. Changing out a lot at once will make the fish uncomfortable. There is no fixed rule on when to change the water; it depends on the water quality. Change more when the water is turbid.