Keeping at least two goldfish in an aquarium is recommended to provide companionship and promote activity.. Solitary fish can be depressed and lethargic. Goldfish are generally non-aggressive, so they can be kept with most fish in the community as long as the other fish are larger than the goldfish’s mouth size.

What size tank do I need for 2 goldfish?

Based on the rules above, the goldfish tank size we recommend for two goldfish is: 42 gallons for two common goldfish. That’s 30 gallons for the first fish and an additional 12 gallons for the second fish.

Do male goldfish chase other males?

Male fantail goldfish will hunt females during mating season as part of their courtship ritual. According to, pheromone-based chemicals are released into the water when mating begins, triggering the hunting frenzy. Initially, all fish may prey on others of both sexes, especially if they are immature.

Do goldfish have to be in pairs?

No, goldfish do not need to be in a pair. The goldfish can live alone without any problem. In the wild, goldfish tend to live alone, and since they also don’t school, you don’t need to keep them in pairs.

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Which goldfish can live together?

Common goldfish do well with other goldfish of similar body types, such as comets and shubunkins. Kites, shubunkins, and wakin’ goldfish are not good choices for living with other fish because they are known to be aggressive feeders that can prevent other smaller, slower moving fish from eating.

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Can you have 2 goldfish in the same aquarium?

Keeping at least two goldfish in an aquarium is recommended to provide companionship and promote activity. Solitary fish can be depressed and lethargic. Goldfish are generally non-aggressive, so they can be kept with most fish in the community as long as the other fish are larger than the goldfish’s mouth size.

Can 2 goldfish live together in a fish tank?

During my experiments with fish in tanks, I discovered that it was possible to run a tank as you would a normal aquarium and keep ammonia and nitrite at a constant 0 with “messy” goldfish. I also kept 2 goldfish in a 3 gallon planted container that were so happy and healthy they even laid eggs!

Is it okay to have only one goldfish?

To answer the question: Yes, goldfish can live on their own. In fact, many goldfish can live long, healthy, and happy lives on their own. Remember, though, that not all goldfish will be happy on their own, and some would prefer the company of other tankmates.

Do Single Goldfish Get Lonely?

However, we can say that goldfish are very unlikely to feel lonely. What is? Goldfish just aren’t the same as humans: They’re not social animals in the same way we are, and they don’t have the same ability to be bored or crave companionship.

Will big goldfish eat small goldfish?

Goldfish by nature are not aggressive and are not predators. The short answer would be “No, they can’t be eaten”.

Why does my goldfish bite my other goldfish?


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The most common cause of a goldfish being territorial is if it is jealous of other fish in the tank or if the tank is too small. Territorial behavior is distinguished by chasing and nipping other goldfish away from a given area of ​​the tank.

How do I know if my goldfish is fighting or playing?

If you notice that a goldfish is always chasing or biting another goldfish, then it is fighting. What is? If this is happening in your tank, you will need to do something about it.

Is 20 gallons enough for 1 goldfish?

So how many goldfish in a 20 gallon tank? The general rule of thumb is 1 gallon of water per 1 inch of fish. This means that a 20 gallon tank is large enough to hold 20 small goldfish. It is important for the health and well-being of your goldfish that you provide them with enough space to swim freely.

Do goldfish prefer long or tall tanks?

While it used to be normal to keep these beautiful fish in a tank, more and more people are beginning to realize that these fish require a lot more space than they normally have. Goldfish thrive in large planted tanks, with plenty of room to swim.

What are the most beautiful goldfish?

The Veiltail is a beautiful type of goldfish that many owners love. When we think of a “fancy” goldfish, these always come to mind first. What is? This breed is known for their very long, flowing fins that hang down and trail behind them as they swim.

How do I know if my goldfish is happy?

Your fish are happy and healthy when:

  1. Actively swim throughout the tank, not just hanging out or lying on the bottom, floating near the top, or hiding behind plants and decorations.
  2. Eats regularly and rises quickly to the surface at mealtimes.

Do goldfish need total darkness to sleep?

Just like humans, goldfish need sleep to replenish their energy and maintain normal immune function. Goldfish need at least 8-12 hours of total darkness to sleep, and anything less will start to show negative health effects over time.

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What is the lifespan of a goldfish?

Goldfish have an average lifespan of around 10 to 15 years, with some varieties that can live up to 30 years when cared for properly. Unfortunately, many goldfish do not reach their life potential due to inadequate housing conditions.

Can a goldfish live with a Betta?

Although betta fish and goldfish can technically live together in the same tank, it should be noted that this can lead to major difficulties and health risks for both fish. As such, we recommend that betta fish live with goldfish as a last resort should an emergency arise in one of their separate tanks.

Do goldfish get depressed or lonely?

Although we can never know for sure, there is no evidence that goldfish are lonely. Chances are when you see a single goldfish appearing lethargic or depressed, it is much more likely that there is a problem with its environment or health than the goldfish is alone.

Is it cruel to keep a goldfish in an aquarium?

The problem with fish tanks

Unfortunately, traditions notwithstanding, experts generally agree that most fish tanks are not suitable for goldfish; keeping a goldfish in one can be considered inhumane.

How big can a goldfish get?

According to National Geographic, goldfish are typically between 7 and 16.1 inches long and weigh between 0.2 and 0.6 pounds, but can exceed 5 pounds in the wild.

Do goldfish need air bubbles?

Yes, Goldfish need air. Although it is well known that goldfish need water to survive, they also depend on fresh air. This is because a goldfish’s internal organs rely on oxygen to function properly. Like humans, goldfish have circulatory systems that help transport oxygen throughout the body.

How long can a goldfish live without a filter or air pump?

A fish lives without a filter for a maximum of seven days and a minimum of three days. A filter helps clean the water over and over again, so the toxins in it don’t settle. But that does not make the filter a necessity for the survival of the fish.

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