Betta Fish or Siamese Fighting Fish is famous among fish keepers because of its highly adaptive nature. These are awesome pets for enthusiastic aquarists. They are native to Southeast Asia. Betta fish has vivid colors and fins. It can survive in most situations but here we will talk about how to care for a betta fish without a filter.

Betta fish are wonderful pets, but it’s crucial to take good care of them so they live happy lives. Poor care can result in stress, illness, and hunger, among other health issues. To maintain a healthy water environment, proper maintenance entails doing routine water changes and monitoring the pH levels, nitrite, nitrate, and ammonia levels. Bright coloring, a lively personality, and a robust appetite are signs of a healthy betta fish. Without a filter or filtration system, bettas can live, but you must create the appropriate habitat. Now we will discuss the main points of how we can care properly for our betta fish without any filtration system.

Making the ideal Environment For Betta Fish to survive without Filter

1. Required Tank Size

Bettas are very active pets so they love to have open spaces to play. They hide under decorations and swim around in fish tanks. The ideal size for a betta is at least 3 gallons (11 liters). However larger the size of the tank the happy and healthy your betta will be. You can keep a betta fish in a bowl but that is not recommended as it might stress your fish.

How to care for a Betta Fish Without a Filter
Betta fish living in a tank without a filter

2. Heater

A heater is important in maintaining the ideal temperature in a tank. The ideal temperature for a betta fish is between 76-82°F. Bettas like to swim around in warm water so it’s crucial to provide them with warm water.

3. Water Quality

Good water quality is a basic need of every fish. If you do not want to use a water filter in the betta tank then you should do a water change every week. Water change increases the amount of oxygen in fish tanks. The ph level of water should be within the range of  6.5 – 7.5. The next thing to remember is the water temperature it should be in the range of 75 – 81F (24 – 27°C). You can use a thermometer to check the water temperature in your fish tank.

4. Proper Feeding

Do not overfeed your betta fish it will create waste in the fish tank. Uneaten food and fish waste can produce harmful toxins such as ammonia and nitrates, which can lower the pH and harm the fish’s gills and other vital organs. Uneaten food should be removed promptly to prevent it from breaking down and affecting the water quality. Use a gravel vacuum to remove any debris from the bottom of the tank, and regularly clean any decorations or plants.

It’s preferable to give your Betta fish a tiny quantity of food 2-3 times each day to prevent overfeeding. The fish can eat enough to maintain its energy levels in this way without generating a lot of waste. It’s crucial to watch how much food you’re providing the fish and to only give them what they can consume in one or two minutes. Unconsumed food should be thrown out right away to keep it from decomposing and lowering the quality of the water in the tank.

5. Add Plants and Decorations

Betta fish are very playful creatures so you should provide them with live plants and decorations. Plants can help improve water quality by removing toxins and providing oxygen through photosynthesis. Moreover, plants provide the Betta fish with cover and hiding places, which can help lower stress and provide the fish with a more natural habitat.

Decorations such as caves, rocks, and other hiding spots also provide the Betta fish with a place to retreat, reducing stress and promoting a sense of security. Decorations also help to break up the line of sight in the tank, reducing the chance of the Betta fish feeling exposed or threatened. But remember that decorations should be cleaned without any toxic detergent or it can affect your betta’s health.

Frequently Asked Questions (FAQs)

Does a Betta Need a Filter?

The ideal fish tank for a betta is a tank with a filter. They can survive without a filter because of their highly adaptive nature but it is recommended to provide them with an ideal environment. A filter helps to maintain a healthy and stable environment by removing waste, uneaten food, and other pollutants from the water. This helps to prevent the build-up of harmful toxins, such as ammonia and nitrates, which can lower the pH and harm the fish’s gills and other vital organs.

Can a betta fish live in a bowl without a filter?

Although theoretically speaking, betta fish may survive in a bowl without a filter, it’s not the best situation for their long-term health and quality environment. Bowls frequently contain small water volumes and are small, which can cause water’s chemistry and temperature to change rapidly. For the fish, this can be stressful and eventually cause health problems.


Caring for a Betta fish without a filter requires a little more effort but is still possible with the right tools and knowledge. It’s important to provide a spacious and clean environment with proper water temperature, chemistry, and aeration. While a filter is not required, it’s recommended for the health and well-being of the Betta fish, as it helps to maintain a stable and healthy environment. If a filter is not used, it’s important to perform frequent water changes and maintain the water quality through other means, such as the use of water conditioners. By following these guidelines, you can provide a healthy and happy home for your Betta fish without a filter.