Betta fish are small, colorful, popular freshwater fish often kept as pets. But why does my betta fish stay at the bottom of the tank?
One of the common concerns among betta fish owners is when their fish seems to lay at the bottom of the tank.
While it’s not unusual for betta fish to spend some time laying on the bottom of the tank, it’s important to understand why they might do this and what you can do to ensure they are well-being and happiness.

In this ultimate blog post, we will explore what cause your betta fish may stay at the bottom of the tank, how to keep your bettas healthy, and what you might do to provide them with an appropriate tank environment.
Reasons Why Does My Betta Fish Stay at the Bottom of the Tank
1. Poor water conditions: One of the most common reasons betta fish at the bottom of the tank is poor water quality, ammonia poisoning, and nitrate poisoning. If the water in the betta’s tank is not clean or there are high ammonia levels, your betta may become stressed and lethargic, causing them to stay at the bottom of his tank.
2. Inappropriate tank size: Betta fish need an appropriate tank size to thrive and be active. If your betta fish is in a small tank, they may not have enough swimming room to swim around and be active, which can cause fish to become lethargic.
3. Inappropriate tank temperature: Betta fish are tropical fish and require warm water to be healthy. If the aquarium water is too low, your betta fish may become sluggish and stay at the bottom of the tank.
4. Tank mates: Betta fish are known to be aggressive and territorial, especially males. If your wild betta fish shares a tank with other fish, they may become stressed and stay at the bottom to avoid confrontation.
5. Illness or disease: Betta fish can be susceptible to various sicknesses and diseases, such as swim bladder disease or fin rot. If your fish suffers from an illness or disease, it may stay at the bottom of its tank and show other symptoms like not eating or swimming normally.
What to Do to Keep Your Betta Fish Healthy?
Regular water changes:
Regular tank water changes are essential to keeping your betta fish healthy. A general rule is to change 25-50% of the water in the tank every week. This will help keep the water tank clean and free from toxins that can harm your fish.
Appropriate tank size:
Betta fish need an appropriate tank size to thrive and be active. A minimum tank size of 5 gallons of water is recommended for a single betta fish. A larger tank will provide more swimming space and better water quality.
Appropriate tank temperature:
Betta fish require warm water to be healthy. The ideal water temp for betta fish is 76-82 degrees Fahrenheit. You can use a heater tank to maintain the water temperature in the tank.
Tank mates:
If you want to hold other fish with your betta, choose peaceful tank mates that won’t compete for resources. Avoid keeping other fish prone to aggression or have long fins that can be mistaken for another betta.
Betta fish care:
Betta fish require proper care, including feeding them a balanced diet, providing them with hiding places and live plants, and keeping the tank clean. Overfeeding your fish can cause health problems, so it’s important to give your fish an appropriate amount of food.
Note: An aquarium filter is necessary to cycle your betta tank. To establish the “beneficial bacteria,” ammonia must be added to the aquarium. This will allow the bacteria to grow and establish itself. Once the bacteria colony has developed significantly, it can convert ammonia into nitrite.
What Should You Do If You Find Your Betta Fish Laying on the Bottom of Tank?
1. Check the water parameters: If you find betta fish laying on the bottom of the tank, first check the water parameters. Use a water test kit stripe to check the ammonia, nitrite, and nitrate levels. If the levels are high in the betta fish tank, do a water change immediately.
2. Check the temperature of the tank: Betta fish require warm water to be healthy. If the tank temp is too low, your fish may become sluggish and stay at the bottom. Use a fish tank thermometer to check the temperature and adjust it if necessary.
3. Check for signs of illness or disease: If your betta laying on the bottom of the tank and showing other symptoms, such as not eating or swimming normally, they may be suffering from an illness or disease. Consult a veterinarian who specializes in fish to diagnose and treat your fish.
4. Check the tank size and tank mates: If your betta fish is in a small tank or sharing a betta tank with aggressive or fin-nipping fish, they may become stressed and stay at the bottom of the tank. Consider upgrading to a larger tank or removing any aggressive tank mates.
5. Keep the tank clean for a healthy betta: Regular water changes are essential to keeping your betta fish healthy. Clean the tank regularly and remove any uneaten food or fish waste to maintain good water quality.
Remember: The ideal ammonia levels for a betta fish tank should be 0 ppm to 20 ppm (parts per million). Ammonia is toxic to fish; even low ammonia levels can cause stress and health problems for betta fish.
During the cycling process of a new fish tank, it is normal to have some ammonia present, but it should be monitored closely and kept at the lowest possible level through water changes and other measures.
Once the tank fully cycles and establishes a healthy bacterial colony, ammonia levels should remain at 0 ppm.
Is It Normal for Betta Fish to Lay at the Bottom of the Tank?
It is normal for betta fish to lay on the bottom of the tank. Betta fish may enjoy laying on the bottom of a tank or sitting on the bottom of the aquarium to rest their fins.

However, suppose your betta fish stays at the bottom of the tank for extended periods and shows other symptoms like not eating or swimming normally. In that case, an underlying issue may need to be addressed.
What to Do If Your Betta Is Laying on Side at the Bottom of the Tank?
If your older betta fish laying at the bottom on its side at the bottom of the tank, it may be a sign that your fish is seriously ill or dying.
This can be caused by many elements, including poor water conditions, illness or disease, or even old age.
Check the water parameters and temperature in the tank, and consult a veterinarian specializing in fish to diagnose and treat your fish.
How Can You Boost Your Betta’s Immune System?
Boosting your betta fish’s immune system can help them fight off diseases and infections and keep them healthy. Here are some easy-to-follow ways you can boost your betta’s immune system:
1. Provide a healthy diet: A balanced and nutritious diet is essential to a betta fish’s health and immune system. Feed your betta fish various high-quality foods, such as pellets, frozen or live foods, and vegetables. Avoid overfeeding your fish, as this can lead to health problems.
2. Maintain good water quality: Good water quality is crucial to your betta fish’s immune system. Keep the container clean and do regular water changes to maintain water quality. Use water test kit stripes to monitor the ammonia and nitrate levels in the water and keep them at safe levels.
3. Provide a suitable tank environment: A suitable tank environment is essential to your betta fish’s overall health and immune system. Provide a tank with appropriate size, temperature, and hiding places. Keep the tank free from any sharp or rough objects that may damage your fish’s fins.
4. Add natural supplements to their diet: Natural supplements like garlic and vitamin C can help boost your betta fish’s immune system. You can add crushed garlic to their food or purchase food with garlic. You can also provide vitamin C supplements to their tank water.
5. Avoid stress: Stress can weaken your betta fish’s immune system, making them more susceptible to diseases. Avoid overcrowding the tank, sudden changes in water temperature or quality, and any other factors that may cause stress to your fish.
Following these tips can help boost your betta fish’s immune system and ensure they stay healthy and happy.
Conclusion
So, why does my betta fish stay at the bottom of the tank breathing heavily? Betta fish are popular pets but require proper care and an appropriate tank environment. If you find your betta fish laying at the bottom of the tank, it’s important to understand why and take appropriate action to keep your fish healthy and happy. Regular water changes, appropriate tank size, appropriate tank temperature, and careful selection of tank mates are all essential to keep your betta fish happy and healthy. By understanding your betta fish’s behavior and needs, you can create an environment allowing them to thrive and enjoy their time in the tank.
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