Welcome to the world of goldfish! Whether you're just starting out in this fascinating hobby or have been keeping goldfish for a while, this blog is especially for you. Goldfish are beautiful, lively pets that can live for years with the right care. In this blog, you'll discover everything you need to know about the basic needs of goldfish and learn about common mistakes beginners often make. This way, you can provide your goldfish with the best care and enjoy a healthy, happy, and long life for your swimming friends. Read on and enrich your knowledge!

What are the basic needs of a goldfish?
Goldfish are beautiful and popular pets, but they require specific care to stay healthy and happy. Here are the basic needs of a goldfish you should know:
Water quality and values
Maintaining proper water quality is crucial for the health of your goldfish. The table below shows the recommended water parameters for a goldfish:
| Parameter | Value |
|---|---|
| Temperature | 18-24°C |
| pH | 7.0-8.4 |
| Ammonia (NH3) | 0 ppm |
| Nitrite (NO2) | 0 ppm |
| Nitrate (NO3) | Below 40 ppm |
Space and Occupation
Goldfish need plenty of space to swim well and develop. It's important to provide them with enough space; we're just offering a guideline. The bigger the better... and definitely not in a fish bowl. Use the following table as a guideline for the number of goldfish per liter of water:
| Number of Goldfish | Minimum Liter of Water |
|---|---|
| 1 goldfish | 100 liter |
| 2 goldfish | 100 liter |
| 3 goldfish | 150 liter |
| 4 goldfish | 200 liter |
Read here what a fish bowl means for your goldfish >
Power supply
A balanced diet is essential for your goldfish's health. Feed your goldfish a combination of flakes, pellets, and fresh vegetables. Avoid overfeeding by feeding small amounts several times a day.
Filtration and Aeration
Goldfish produce a lot of waste, so a powerful filter is essential to keep the water clean. Also ensure adequate aeration to maintain oxygen levels in the water.

Regular Maintenance
Perform partial water changes (approximately 10-20%) weekly to maintain water quality. Check the water parameters regularly and clean the filter according to the manufacturer's recommendations.
With proper care and attention, you can enjoy a healthy and vibrant goldfish that will be a beautiful addition to your aquarium for years to come.
What mistakes do beginners often make when caring for goldfish?
Caring for goldfish seems simple, but beginners often make some common mistakes that can affect their fish's health. Here are the top 10 mistakes to avoid:
Top 10 Mistakes in Goldfish Care
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Using aquariums that are too small: Goldfish need a lot of space. A small tank is not suitable; choose an aquarium with at least 50 liters for one goldfish.
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Don't use a filter: Goldfish produce a lot of waste. Without a good filter, water quality can quickly deteriorate.
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Overfeeding: Too much food can lead to water pollution and health problems in the fish. Feed small amounts several times a day.
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Insufficient water changes: Regular water changes are essential to maintain water quality. Change 10-20% of the water weekly.
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Not paying attention to water parameters: Regularly check the pH, ammonia, nitrite and nitrate levels to ensure a healthy living environment for your goldfish.
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Neglecting filtration and aeration: A good filter and adequate aeration are necessary to maintain oxygen levels and water quality.
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Too many goldfish in one aquarium: Keep the number of goldfish within the recommended limits to prevent overcrowding and stress.
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Ignore plants and decorations: Goldfish love an enriched environment with plants and hiding places. This helps reduce stress and stimulates their natural behavior.
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Insufficient Lighting: Provide adequate lighting to maintain a stable day and night cycle, which is important for the health of the fish.
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Neglecting the temperature: Keep the water temperature between 18-24°C. Fluctuations or excessively high or low temperatures can cause stress and disease.
By avoiding these common mistakes, you can significantly improve the health and lifespan of your goldfish. Good luck caring for your fish!
