This hormone gets diluted during water changes which cause the fish to continue growing. This is why regular water changes are key to the healthy survival of your goldfish. When this hormone builds up in the water, it significantly reduces the growth of goldfish.

The growth of a goldfish depends on the water condition in the tank next to the Growth Inhibiting Hormone that they produce. As we already mentioned, this species is one of the most remarkable fish out there if not in the whole animal kingdom. If you keep your goldfish in the right conditions, there is no way that it will not outgrow a 10-gallon tank. Some goldfish species grow up to 12 inches and possibly more which easily answers your question about space.Īlso Read: Do Goldfish Need a Filter? (Filter Buying Guide) When you look at it now, do 3-5 years in a bowl sound like a happy and healthy life? No, the truth is that such goldfish are unhappy, unhealthy, and do not grow even halfway to their true size.Īs for the question about a 10-gallon tank, it is only suitable for one or two baby goldfish.Īs soon as they start outgrowing the tank, you will need to consider at least 20 gallons of space for every other fish. It could be because it is such a common occurrence to see goldfish in movies or because people think that just because someone’s goldfish survived for several years in a bowl.Īt the same time, the natural lifespan of goldfish is around 25-30 years. This is the most common misconception in the world of fishkeeping. To startup, we all have seen countless cases of goldfish in a bowl or a small aquarium. You can also check out some of the Best Fish for a 10 Gallon Tank! Why is a 10-Gallon Tank Too Small? To learn everything about Goldfish and the suitable tank sizes for this species, continue reading below. However, as long as you plan to move your goldfish to a larger tank in the future, you can keep it in a 10-gallon tank as a start. Most species outgrow a 10-gallon tank in a matter of years. With this said, how many goldfish can you keep in a 10-gallon tank? A tank of this size is insufficient for a goldfish if you want it to live a long and healthy life. In most cases, newbies get a goldfish and put it in a bowl or small aquarium because of the common misconception caused by movies and mass media which is the complete opposite of the truth. They are among the most remarkable fish species out there due to their intelligence which allows them to remember given things for months and even learn tricks. When kept in the right conditions, goldfish can live for decades. Goldfish are among the hardiest fish out there which is why they have always remained a popular choice for hobbyists.

Small goldfish aquarium