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Goldfish Keeping – 8 Mistakes Made

8 Mistakes Made by Goldfish Keepers

Goldfish Keeping

Goldfish keeping is popular, but there are several common mistakes fish keepers make when caring for them. This can lead to health problems and even death for the fish. Let us look at eight of the most common mistakes goldfish keepers make.


Overfeeding your goldfish is a common mistake that many new owners make. It’s essential to know how much to feed your fish and to stick to a regular feeding schedule. Overfeeding can lead to a number of problems, including pollution of the water, unhealthy growth, and even death.

Goldfish are voracious eaters and will pretty much eat whenever they can. This can be a problem if there is food available all the time. They will overeat and become obese, which can lead to health problems. It’s important to control the amount of food you give your goldfish and to stick to a regular feeding schedule.

Overfeeding also leads to water pollution. The uneaten food and waste produced by the goldfish pollutes the water. This can make it difficult to maintain a healthy environment for your fish.

Finally, overfeeding can cause unhealthy growth in goldfish. They may grow too fast and become deformed. This can lead to a shortened lifespan and a poor quality of life.

If you think you are overfeeding your goldfish, stop feeding them for a few days and see if their appetite decreases. You may also need to change the type of food you are giving them. Stick to a regular feeding schedule and pay attention to the amount of food you are giving them. Overfeeding is a common mistake, but it’s one that is easy to avoid with a little bit of knowledge.

Not Cleaning Tank Regularly

Goldfish are often seen as low-maintenance pets, but that doesn’t mean they don’t require any care at all. One important aspect of goldfish care is cleaning the tank regularly.

If you don’t clean the tank regularly, your goldfish can suffer from a number of health problems. Ammonia and nitrites can build up in the water, which can be harmful to your fish. Additionally, uneaten food and other debris can accumulate in the tank, causing it to become dirty and unpleasant.

Cleaning the tank is not difficult, but it does require some time and effort. You’ll need to empty out the water, clean all of the surfaces, and then refill the tank with freshwater. This process should be done every two weeks or so to keep your fish healthy and happy.

If you’re not sure how to clean a goldfish tank, there are plenty of resources available online or at your local pet store. With a little bit of time and effort, you can easily keep your goldfish tank clean and healthy.

Not Using A Filter

Goldfish are often kept in small bowls or tanks. However, if you don’t use a filter, your fish will eventually suffer from a number of health problems.

One of the most serious problems that can occur is ammonia poisoning. Ammonia is a waste product that is produced when goldfish breathe and excrete. If it builds up in the water, it can be fatal to your fish. A filter will help to keep the ammonia levels in your tank low by circulating the water and removing the waste products.

Another problem that can occur if you don’t use a filter is that your goldfish will become susceptible to diseases. Goldfish are very sensitive to changes in water quality, and a dirty tank can lead to a number of different illnesses. By using a filter, you can help to keep your goldfish healthy and free from disease.

If you don’t use a filter, the water in your tank will become stagnant and smelly. Goldfish need fresh, clean water to stay healthy, and a filter will help to ensure that the water in your tank is always fresh and clean.

Using Tap Water

You’ve probably heard that using tap water for goldfish is not a good idea. But why is this? What are the harmful effects of using tap water with goldfish?

The main reason why using tap water for goldfish is not recommended is because it contains chlorine. Chlorine is added to municipal water supplies to kill bacteria and other harmful organisms. While this is great for humans, it can be very harmful to fish.

When fish are exposed to chlorine, it can damage their gills and cause respiratory problems. In high enough concentrations, chlorine can even kill fish. So, if you’re using tap water to fill your fish tank, you’ll need to treat it first to remove the chlorine.

There are a few different ways to do this. You can buy a water conditioner that will remove the chlorine from your tap water. Or, you can let the water sit for 24 hours before adding it to your tank. This will allow the chlorine to evaporate on its own.

In addition to chlorine, most tap water contains other chemicals, such as fluoride and chloramine. These chemicals can also be harmful to fish if they’re not removed before adding the water to your tank.

Not Using A Heater for Goldfish Keeping

Goldfish are cold-blooded creatures, which means that their body temperature is the same as the water around them. In the wild, fish live in ponds that are heated by the sun. But in captivity, goldfish rely on their owners to provide them with a consistent water temperature.

While goldfish can withstand a wide range of water temperatures, they prefer water that is between 70 and 72 degrees Fahrenheit.

If the water temperature drops below 70 degrees, the goldfish will become sluggish and stop eating. This can lead to a number of health problems, including respiratory infections and immune system disorders. In extreme cases, the cold water can cause the goldfish to go into shock and die.

Heaters are essential for keeping fish healthy and happy. If you do not have a heater, you should consider getting one as soon as possible. Not using a heater with fish can have harmful consequences.

Not Using An Air Pump for Goldfish Keeping

One of the essential functions of an air pump is to oxygenate the water. Without adequate oxygen, goldfish will suffocate and die. In addition, not using an air pump can also cause problems with the water quality, as it can lead to a buildup of toxins and a decrease in filtration.

Another problem when you don’t use an air pump with goldfish is that the fish can become stressed. This is because they are not able to swim properly and may become entangled in plants or decorations. Stress can also lead to other health problems, such as a weakened immune system and increased susceptibility to disease.

Keeping Goldfish With Other Fish

One of the biggest mistakes that fish keepers make when is keeping them with other fish. While it might seem like a good idea to put different types of fish together in one tank, doing so can be harmful to both the fish and the other fish.

Goldfish are cold-water fish and need water that is cooler than what most tropical fish thrive in. This means that if you put goldfish in a tank with tropical fish, the tropical fish will likely out compete the fish for food and space. The goldfish will also produce more waste, which can lead to ammonia and nitrite buildup in the water, putting the tropical fish at risk.

Not Quarantining New Fish when Goldfish Keeping

It is important to quarantine new fish before adding them to your fish tank. This is because new fish can carry diseases that can harm your existing fish.

When you don’t quarantine new fish, you’re putting your existing fish at risk of getting sick. Quarantining new fish helps to ensure that your goldfish stay healthy and disease-free.

Here are some of the harmful effects of not quarantining new fish when keeping fish:

  • Your fish could get sick or die form the sudden exposure to new diseases or conditions in the tank.
  • Your goldfish could end up passing on diseases to other fish in the tank, which could cause an outbreak.
  • Risk of introducing invasive species into your tank, which could be harmful to native wildlife.

Final Thoughts

There are a number of mistakes that goldfish keepers make, and we have highlighted eight of the most common ones above. By avoiding these mistakes, you can help to ensure that your goldfish stay healthy and happy, and last for longer periods.