What ph is good for betta fish?

In this blog we will discuss the ideal pH for betta fish. We will cover everything you need to know about pH, why it is important and the best pH range for your betta aquarium.


In this blog

  • What pH is good for betta fish?
  • How do you reach the ideal pH level for your betta fish?
  • Can bettas survive in pH above 7.5?
  • Can bettas tolerate extreme acidic conditions?
  • How can you measure pH level in betta aquarium?
  • How often should you measure pH in a betta fish aquarium?
  • How to increase pH in betta fish aquariums?
  • Are betta fish pH sensitive?
  • Summary 
  • Frequently asked questions
  • Reference

What pH is good for betta fish?

Every fish has a specific need for water parameters, and pH is one of its most important aspects. Knowing the correct pH for betta fish and how to achieve it will help you keep your betta fish safe and healthy. 

The optimal pH for bettas should be maintained between 6.8 and 7.5. However, they can survive in slightly more acidic conditions.

Regardless of what type of water you use for your betta’s tank, you should have an idea of ​​what the baseline pH is.

It’s important to get the ideal pH, but it’s even more important to keep it stable.

How do you reach the ideal pH level for your betta fish?

Use test strips or pH testing kits to check the pH of the aquarium and the water you are about to add to the aquarium.

However, the easiest way to maintain the pH preferred by betta fish is to use a product aimed at adjusting the pH range between 6.8-7.5, regardless of current levels.

There are a variety of products you can buy to help slowly adjust your pH and make sure your pH stays at a certain level.

  • Catappa leaves- Catappa leaves tannins leaching into the betta aquarium water and lowers the pH of the aquarium water.The use of the leaves is famous among betta breeders
  • Indian almond leaves- One of the best ways to lower the pH level in an aquarium is to add a few Indian almond leaves to it. They can lower the pH in hard water to around 6.0 and in soft water to around 5.0.
  • Driftwood- Adding a small amount of natural driftwood to bettas aquarium will safely lower the pH. The driftwood will release tannins into your aquarium water, lowering the pH. However, because it contains tannins, it also turns the water yellow or brown.
  • Peat moss- Peat moss is one of the most effective ways to naturally lower the pH level in bettas aquarium. Peat moss filters water pollutants. It works best when added to the filter inside the mesh bag.Put some peat in the bag at a time.If we add too much at once, the fish can go into pH shock.
  • Barley straw- Barley straw tends to acidify water by lowering the pH.Aquarium strength water barley straw extract is ideal for a natural and environmentally friendly way to keep your water clean.It is safe to use, non-toxic to betta fish and does not affect aquatic plants.
  • Cholla wood- Cholla wood is a great natural way to lower the pH, unlike other types of driftwood,it’s covered in tiny holes. Although this sounds amazing, it reduces how long cholla wood stays in your tank.

Can bettas survive in pH above 7.5?

Betta can live longer at pH 7.8, but in basic water it can accumulate organic pollutants such as ammonia and nitrite, which can be very harmful and dangerous to them.

Ammonia and nitrite levels in the bettas aquarium should always be kept below 0.5ppm, but it is preferable to go as close to zero as possible and nitrate should be below 20ppm.

Anything beyond this range can be detrimental to bettas.

Can bettas tolerate extreme acidic conditions?

Betta fish, forced to live in acidic water, quickly begin to undergo behavioral changes. At first, your pet may desperately swim or try to jump out of the tank.

Your betta will likely lose the ability to breathe through its gills and will reach the surface gasping for air. Visible signs of low pH are red burns or lesions.

How can you measure pH level in betta aquarium?

Measuring pH levels in bettas aquarium water is very important, but it is also easy and should never be ignored. There are various options available today, but the most affordable and accurate options include test straps and digital test kits.

Test strips are, above all, a truly cheap solution. They consist of small strips made from litmus paper. Various packages are designed for one-time use and are usually disposable, so they usually contain dozens of such strips.

Testing strips is very easy to use. Simply submerge the strip in tank water for a few seconds and compare the pH value by color. If you use this measurement solution, get it from a trusted brand as the quality is often inadequate.

A digital pH meter does not require a large investment, but it is certainly more reliable and accurate. The Apluste digital pH meter is quite popular and it is completely accurate and very easy to use.

How often should you measure pH in a betta fish aquarium?

If you are new to betta fish, it is advisable to measure your pH level every 2-3 days. However, once you’ve learned more about aquarium water and feel confident, it’s okay to test your water parameters every two weeks.

How to increase pH in betta fish aquariums?

If your water test results show pH levels that are too low, you need to take action by raising it again.

Try cleaning the betta fish tank. You can change the pH level quickly by replacing the water partially and removing all debris from the gravel and decorations. On top of that, a little decoration not only looks good, but can also raise the pH level.

Choose a rocky decoration that contains calcium. This releases calcium into the water and automatically increases its alkalinity. Coral sand is a great solution.

Are betta fish pH sensitive?

The betta fish is quite hardy and tolerates some fluctuations in water parameters.

However, higher pH levels can lead to higher levels of ammonia, which can quickly reach toxic levels.Lower pH levels can also quickly damage your betta’s outer and inner surfaces.

Bettas should not be placed in water that is too alkaline or acidic. For this reason, chemical solutions are generally not recommended to solve pH problems, as they cause large and unpredictable changes in water parameters.

Betta is extremely sensitive to any changes in water parameters and can easily go into a state of shock if they fluctuate.Therefore, constant monitoring is essential.


Betta fish can be tough pets once they have the right basic environmental conditions. And one of the key factors is definitely to provide them with the ideal water pH level.

Betta fish are fairly hardy fish, but stable pH is still important.Betta fish do best in a pH range of 6.8 to 7.5.

Regular monitoring of pH is one of the most important aspects of tank care, and knowing how to maintain it can keep your betta safe and healthy.

Understanding how the items in your tank can affect pH will help you maintain the correct pH level.

If the water in the aquarium becomes too acidic, it will have a negative effect on betta fish. Such high levels can cause skin burns and skin lesions on bettas body and can lead to illness if not noticed.

The pH is sensitive to other water parameters and should be monitored and recorded regularly in the aquarium.

It is important to record all water parameters and to react as soon as possible if these parameters are abnormal.

Cleaning the tank is always a convenient option in the event of a spike in pH value across the water in the tank. Partially replacing alkaline or acidic water with fresh water will definitely work.

Once you learn the basics, maintaining a stable pH is not that difficult. A quality test suite is basically the only tool you need here. Beyond that, just make sure to clean the water regularly, but also to remove any food scraps or rotting algae.

If your pH level is a little out of the normal range, don’t panic.Just detect the cause of the fluctuation and improve it.

Frequently asked questions

Does aquarium decorations affect the pH?

Everything in the aquarium affects pH, from the choice of decoration to the level of aeration and other water parameters.

Does high pH attract algae to betta tanks?

One of the main signs of high aquarium pH is excessive algae growth. If you notice this, you need to check the pH level in the aquarium.