March 14

Sarah Robertson

How Often to Change Betta Water?

If you've just set up a betta fish tank or acquired a betta fish, you'll need to know how to care for it. The most essential aspect of caring for a betta fish is ensuring that the water in the tank is clean and safe. To maintain the tank clean, you must be aware of how to change and how often to change betta water. It is the most essential element in the long-term wellness of your betta fish. If you're a novice fish keeper, this article will walk you through the steps.

How to Change Betta Fish Water?

When it comes to caring for a betta fish, one of the most essential things to understand is how to properly change the water in its tank or bowl. Containers that are unclean can make your betta ill and improper water changes might also harm the fish. There are two methods for changing a betta’s water:

1.Partial Water Change:

The partial water change is usually preferable, as totally new water can shock the fish. The water in the aquarium should always be fully dechlorinated before it is added to your betta's tank or bowl. You can do this by simply adding a water conditioner (also called dechlorinator) when you add fresh water, like in the partial water change method.


  • Prepare the Fresh Water Keep a large container with new water next to your betta's tank. You can use a water conditioner (available at pet supply stores) to remove chlorine and other harmful substances from the fresh water.
  • Allow the Water to Warm UpBefore you put the new water in the tank, make sure it's at room temperature. To preserve the safety and comfort of your fish, you should allow the container of fresh water to sit at room temperature for an hour. If there's no heater in your betta's container, make sure you use warm water (not hot or cold) in this case.
  • Remove Some Water From Your Betta’s Current Container : In this step you need to remove some water from tank and replace it with the new water. This is can be easily done by simply placing the aquarium on a table and then use a small container to scoop out some of the water from your betta's bowl. This is usually fine as long as you take out around 25 percent of the water in his container. It's important to note that this will be easier if you use a container with a wide opening. 
  • Refill Your Betta’s Container  : When you've removed enough dirty water from your betta's tank, it's time to slowly pour new clean water. When there's too much water in the container to lift and pour it out, You might use a clean scoop (or comparable container) or a siphon hose to add the water. After you've changed the water in your betta's bowl or container, you will need to add some chemicals to it. You can use a water conditioner to take away harmful substances from the new water, including chlorine and ammonia. You will also need a little bit of aquarium salt in the tank. This will keep your betta's water levels healthy and stable. Finally, Place your betta into his aquarium and watch him swim around for a few minutes to ensure that he's comfortable and secure.
water changes

2.Full Water Change :

A full water change entails removing all of the water from your betta’s container and replacing it with full amount of new water. It's called a full change because you completely replace the amount of water in your betta bowl or aquarium. This is not necessary unless you notice some water quality problems with your betta's habitat. It's not a good idea to do this frequently, as it can be stressful for your fish.


  • Prepare the New WaterWith the help of a water conditioner, you can remove chlorine and other harmful substances from the fresh water.
  • Let the Water Warm Up: You may mix hot and cold water from your tap until it is the same temperature as the water in his or her existing container.
  • Transfer Your Betta From Its Container: Remove your betta from the old container to the one with fresh water using a fish net. When moving your fish, be cautious since its fins are quite fragile.
  • Clean the Betta’s Container: After Pouring out the old water from your betta’s container, you can clean the container with a soft cloth or sponge. It's not worth cleaning the tank with chemicals or soaps since they might harm your fish.
  • Begin Filling the Betta’s Container: Take some of the fresh water from its current container and pour it into his or her own. Pour enough so that your betta can swim freely in its container.
  • Transfer Your Betta Back to Its Container: Remove your betta from the holding tank and return it to its container, now completely filled with fresh water, using a fish net. When moving your fish, be extremely cautious.
  • Pour the Rest of the Water Into Your Betta’s Container: Pour the remaining fresh water in to the tank and very slowly so that you do not disturb your fish.

If you have done all of these steps properly, then your betta fish can live happily in a clean environment. Your betta will also show better coloration when comfortable and healthy. Make sure to take good care of your betta by following these steps. This will keep Betta healthy and happy.

How Often to Change Betta Water?

Small water changes of 10-20% once every 7-10 days are ideal for your betta's health. This is also based on the fact that you are using a filter. Water changes of 20-30% can be done once every 2-3 weeks, but smaller water changes are preferable for stable water conditions!

Factors That Control the Frequency of Water Change

The frequency of water change differs from one fish keeper to another depending on how they maintain their aquariums. Some people do the water change every day while others once in two weeks or so.

There Are Many Factors That Control the Frequency of Your Betta's Water Change.

Here Are Some of the Factors:

  • Size of the Tank/container : If you have smaller tank size, then you must do a water change more often than if you have a large aquarium.
  • Size of Your Betta Fish: A larger betta requires more  frequent water changes because it produces more waste.
  • Living Environment: If it is an extreme temperature such as very hot or very cold, then you will need to change the water more often.
  • Diseases or Parasites: If your betta has any diseases or parasites then you should do a complete water change as soon as possible.
  • Unpleasant Odors: Another reason for doing a water change is bad or unpleasant odors coming from your tank. A cloudy water appearance in the aquarium also means that you must change the water.
  • Ph LevelsUnless your water has a pH level of 7.0, you should do a water change once a week to keep it at the best level for your betta fish.
  • Frequency of Feeding :  Generally, betta fish do not require much food. So feeding your betta once or twice daily is more than enough. If you feed him more often than that then you must change the water more often too.
  • Color of your betta: If your betta has beautiful colors and his fins are spread out nicely, he is healthy and happy. If you find any color change to your betta 's body or fins, then you need to do a water change as soon as possible.
  • Types of Fish Medications: If you use fish medications in your betta's tank and if it contains copper, then you must do the water change immediately.
  • Type of Fish Food: The type of food that you feed your betta also affects the frequency of water changes because certain foods pollute the aquarium more than others.
  • The frequency of changing your betta's water depends on many factors. However, if you take care of your betta properly, then you will not have to change the water as often.
aquarium water change

What Water Conditions Do Bettas Prefer?

Betta fish prefer a pH of between 6.8 and 7.5 in their water, which is known as soft or acidic water. While they appear to be able on colder temperatures, they will be sluggish and more prone to disease, therefore it's optimal for their general health if the temperature is maintained at 76° to 85° F.

Why Are Water Changes Important?

Water changes are required for the proper development, biological function, and coloration of your fish. Water changes also aid in the maintenance of ideal salt concentration.

Are Filters Good for Bettas?

Betta fish benefit greatly from aquarium filters, which provide a more clean and beneficial bacteria environment. The ideal fish filters constantly turn the water in the tank and encourage sanitation. Mignon Filter 60 and Aquaclear Cycleguard are two of the greatest betta fish tank filters available.

How Long Can a Betta Fish Go Without a Water Change?

Betta fish that dwell in large aquariums can go for up to three weeks without a water change, but only if you have a good water filter system in place. You must replace 30% to 50% of the tank's water every week if your betta fish resides in an unfiltered aquarium.

Is Distilled Water Ok for Betta Fish?

The best water to add to your tank is tap water, as long as it has been conditioned first. If that isn't an option, consider using spring water. ALWAYS avoid distilled or purified water because it lacks the essential minerals and nutrients your betta needs to survive.

Why Are Water Changes Important?

Water changes are important because of pH levels. Bettas prefer pH levels of 6.5 and 8. If the pH level in your aquarium is higher than that, your betta will become sluggish and prone to disease.

A series of partial water changes will raise the pH if your tap water has a higher pH than your tank.. Buffers may also be added to tank water over time to increase Ph without changing the water. Although a water change is recommended.

Are Betta Tanks Difficult to Clean?

Betta tanks are easy to clean and won't take too long. A good time to clean your aquarium is when you're doing a water change. It's best to clean the aquarium once a week, or as frequently as twice a month.

Benefits of Adding Live Plants

In highly-stocked tanks, plants are useful for removing carbon dioxide buildups. Real plants also absorbs ammonia, nitrites, and nitrates in the water as waste is broken down.

How to change betta fish water

What Are the Tools and Instruments Needed to Clean a Betta Tank?

Aquarium Siphon: The aquarium siphon will quickly and quietly remove large quantities of water from your betta's tank using a minimum amount of effort. The best way to get the job done is with an Aquarium Vacuum Cleaner .

Water Conditioner: A good conditioner will make tap water safe for your betta's aquarium, which will eliminate the need for frequent water changes.

Algae Scraper :  An algae scraper will remove any traces of algae from the glass.

Fish Net:  Using fish net is a easy and effective way to remove fish and other objects from your tank.

Aquarium Gloves: Use gloves when performing any water changes or tank cleanings. Fish are very sensitive to harmful chemicals, so keep the hands away!

Aquarium tweezers :   Most bettas can be handled with a pair of aquarium tweezers . Tweezers make it easier to catch your betta without harming him.

Small towel / cloth:  A clean and soft towel or cloth is needed to wipe the inside of your betta's tank.

Aquarium Brush: An aquarium brush is good for keeping your tank clean.

Thermometer: Always use a thermometer to monitor the temperature of your betta's aquarium.

Tray/Bucket: Place all of these  equipment in a tray or bucket when cleaning and it will be easier and more effective.

Water Testing Kit:  A water testing kit is needed to determine the pH levels in the tank.

Final Thoughts

Water changes are simple to perform and essential, as long as you follow a few fundamental guidelines! Water changes should always be performed on a regular basis rather than at long intervals. When you're adding fresh water, keep in mind that it's best to match the temperature and chemistry parameters as closely as possible since a too rapid change might expose your fish to disease or other issues.

Sarah Robertson

I am a passionate blogger who also happens to be a fish keeping enthusiast. Writing about my hobby is something that I absolutely love to do, and it's no secret that my chosen topic is always centered around fish keeping.

Sarah Robertson

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