The goldfish ( Carassius auratus) suffers more than most fish. Many people have them in small bowls, but they never think that you might need a large aquarium for the goldfish.
This has a lot to do with the fact that there are many false perceptions about it, and unfortunately there is a lack of knowledge about how to take care of them properly.
Goldfish are very social animals. They also have a strong character, which they frequently show with their interesting behavior. Today we will talk about how big a goldfish aquarium should be.
How can you find out how big an aquarium you need for the goldfish?
Many will say that 94 liters is the smallest for a goldfish. They will also address how much extra water is needed for each fish.
But that volume is actually not enough. There will not be a large enough aquarium for your goldfish.
The best rule to use is “six times the length” when it comes to goldfish. That proportion will give them enough water.
You should also measure by how big the fish can be, and not by how big it is when it is still young.
The difference between an ordinary goldfish and a comet
Many will also address size differences for the aquarium if you are going to have a regular goldfish compared to a comet goldfish (or comet-tailed goldfish).
The common goldfish has only a hind fin (tail) and a long body. This is the more “traditional” goldfish.
The comet goldfish, on the other hand, has developed a more specific body shape, and it tends to have double fins.
Comet goldfish also tend to have much larger heads and even larger eyes. It also tends to have a rounder and more compact body.
The size of an adult goldfish
A fully grown goldfish can easily grow 30 cm long and 30 cm wide, including the fins and tail. An adult goldfish will be as big as a grapefruit and weigh about 500 g.
The various goldfish with shorter fins may be shorter in general, but it still has large bodies. So you understand that a 94-liter aquarium would have been difficult for the goldfish to swim around in.
Other goldfish can be even larger than mentioned above. This is especially true for goldfish with longer fins, such as the comet goldfish.
How to know if a large aquarium is needed for the goldfish
Let’s take a look at some of the things you should keep in mind when choosing the best size of aquarium.
The comet goldfish tend to have some difficulty swimming.
As it has undergone genetic modifications, it has long fins, a rounded body and a disproportionate head, poor eyesight and a compact body that makes it unable to swim properly.
Because it is not very flexible, it needs a lot of space so that it can turn around. It does not swim that fast, but it still needs plenty of space to move.
Ordinary goldfish are faster and much smoother than comet goldfish.
The surface area
It is at the surface area that the exchange of gases occurs. This means that the larger the surface area, the more surface area there is for oxygen to enter and carbon dioxide to exit.
This is important for the goldfish because it needs a lot of oxygen in the water. In other words, it is better for those with a larger area.
Many goldfish have respiratory problems because they have underdeveloped gills. It is therefore important for those with a well-oxygenated aquarium.
The bigger the fish, the more waste it will produce. The waste that the fish emits is called “organic material”.
A fish that produces a lot of this will need a larger volume of water and significantly larger filters to keep the water clean.
Both the common goldfish and the comet goldfish can live up to 25 years. The more elegant goldfish variants should be able to reach between 10-15 years. Think about this – it’s a long time.
It would not have been fun to have to spend all this time in a small space without something to interact with.
This is another reason why the goldfish need a large aquarium. It should be large enough for it to swim around, play and eat. This will keep it stimulated for many years.
Aquarium for goldfish: what size should it be?
Goldfish do not need a huge aquarium. 122 x 51 x 51 cm is the minimum requirement. The larger common goldfish that we mentioned should have an aquarium of 203 x 61 x 61 cm. They should preferably live in an open aquarium rather than a closed one.
They will then have enough space to live well. They will be able to move and you will be able to add decorations and also include fish lovers who will show you all the behavior of the goldfish.
This ensures that they do not feel stressed, trapped or alone.