How to give a betta fish an Epsom salt treatment?

In this article we will discuss epsom salt treatment for betta fish.In this article, we will explain how to give a betta salt bath, when to give a betta salt bath, and how often to give a betta salt bath.


In this blog

  • How to give a betta fish an Epsom salt treatment?
  • Epsom salt treatment procedure for bettas
  • When to give epsom salt treatment to bettas?
  • How often can you soak the betta fish in epsom salt?
  • What are the benefits of using epsom salts for betta fish?
  • Summary 
  • Frequently asked questions
  • Reference

How to give a betta fish an Epsom salt treatment?

Epsom salt- More correctly known as magnesium sulfate, epsom salt is a chemical compound containing sulfur, oxygen, and magnesium.

  • Epsom salts also known as magnesium sulfate.
  • Epsom salt bath should be given twice to a severely ill betta fish.
  • Epsom salt bath should be given once to a mildly severe betta fish.

You should use different tanks to give epsom salt treatment to your bettas:

Isolation or quarantine tank for bettas

If you’re going to give your betta an epsom salt bath, the first thing you’ll want to do is prepare an isolation or quarantine tank.Fill the quarantine tank with dechlorinated water 

It can be 1 gallon in size, but no more than five gallons. This way, you don’t have to remove too much aquarium water from the main tank.

When setting up a quarantine betta tank, just make sure the temperature is the same as the main tank and that you have conditioned water.

Revival tank for bettas

You should also prepare a revival tank for your bettas. But this time, a quarter of the tank should be a salt bath and 3/4 water from your aquarium. Doing so will help your betta fish to acclimate to their tank easily.

You also need a thermometer to make sure that the water temperature in all tanks is kept constant. This will prevent the betta from receiving a temperature shock.

Return bettas to their main tank

After the salt bath is over, place the betta into the main tank. However, once the bettas are back in the main tank, you should continue to monitor their health to make sure there are no complications from the salt bath.​​​ 

If you notice complications, then you should avoid salt bathing your betta again.

Epsom salt treatment procedure for bettas

Carefully remove the bettas with a net and add to the curing tank. Once added to the curing tank, keep it for 5-8 minutes.

If at any time you notice that the gills of a betta fish have stopped moving, this means that it is losing balance, having trouble swimming, or losing consciousness; Then you must remove them immediately and add them to the revival tank.

Once your betta is in the revival tank, you will need to keep it there for about 5 minutes before eventually returning it to its main tank.Now, when your betta enters his main tank, the salt bath is over.

Important points to remember:

  • A thermometer with which you can check water temperatures.
  • Fish net to safely move your betta between tanks.
  • A stopwatch so that you can use accurate handling times.
  • Measure spoons to use the correct amount of epsom salt.
  • With epsom salt, bettas need to stay for 10 to 15 minutes, 10 is less serious and 15 is a more serious need. Do not exceed this time.

When to give epsom salt treatment to bettas?

Bettas suffering from constipation

Constipation is a fairly common problem in betta fish. Problems arise when you overfeed them, only feed them dry food, or don’t include enough live or frozen meaty foods in their diet.

Constipation can usually be treated very easily by fasting betta fish for 24-48 hours and then providing them raw or thawed frozen food.If that doesn’t fix the problem and makes things happen again, an epsom salt bath will usually do the trick.

Epsom salts can be used to treat mild bloating and constipation in bettas caused by overfeeding.

Take some water from your betta tank and put it in a clean bowl. Add 1 teaspoon per 5 gallons of Epsom salt to the bowl for treating bettas suffering from constipation.

Bettas suffering from swim bladder disease

Swim bladder disease can be caused by overeating, constipation, various bacterial infections, and certain injuries. It can be temporary or permanent.

Epsom salt baths can help relieve swim bladder issues. However, it is best to fast your betta for 24 to 48 hours before bathing your fish.

Mix one tablespoon of epsom salt with half gallon conditioned water. Then you can replace the aquarium water with the epsom salt conditioned water.Put the bettas inside the tank for 15 minutes and keep monitoring them.

  • If they recover well and swim properly, they can be removed from epsom salt treatment.
  • If they don’t move and stay in place, don’t remove them from the treated tank.

Bettas suffering from dropsy

Dropsy occurs in betta fish due to the accumulation of fluid within the body cavity or tissues.It indicates many underlying disorders, including bacterial infections, parasitic infections, and liver dysfunction.

Transfer the sick bettas from dropsy infection to the treatment tank. It is important to move the infected fish to another aquarium and separate it from the rest of the healthy fish.

Add epsom salt at the rate of 1/8 teaspoon per 19 liters of water. Epsom salt will reduce swelling.

Bettas suffering from popeye

Popye is a condition in which the eye of a betta fish swells and bulges out of its socket. The eyes may also appear cloudy and if left untreated, popeye disease can cause fish to lose their sight or even lose an eye.

Epsom salt, or magnesium sulfate, is effective in removing water that has accumulated behind the eyes of betta fish. Add 1 tablespoon for every 5 gallons (18.9 L) of water containing fish every 3 days.

How often can you soak the betta fish in epsom salt?

When giving your betta fish epsom salt bath, avoid doing it for more than 8 days. Beyond that, salt baths can have a negative effect on solids. Ideally, the timing of the salt bath should be about 5 to 8 minutes.

What are the benefits of using epsom salts for betta fish?

There are various benefits of using epsom salt for betta fish:

  • Epsom salt dip can be given to treat constipation in betta fish.
  • Epsom salt acts as a muscle relaxant, and soaking a tablespoon of epsom salt in 1 gallon of water for about 15 minutes often works.
  • Epsom salt is used to treat swim bladder disease and dropsy in bettas.
  • When used correctly on bettas with a swim bladder disorder, epsom salt can help them swim better.
  • Epsom salt is used to treat popeye disease in bettas.


Before deciding to give betta epsom salt baths, you need to make sure that you intend to treat them for the appropriate illness.

Epsom salt for betta fish is used as a laxative. The fish absorbs the treated water and helps it to expel the detritus or waste products.

Epsom salt treatment for betta fish can also be sucked into to help reduce bloating or swelling. A reduction in water can bring your betta back to normal size.

The main advantage of epsom salt is the fact that it is a muscle relaxant. This means that bettas can easily pass through any waste products in their digestive system.

If your betta fish are suffering from something more serious, an epsom salt bath may not be enough to keep them warm. In such cases, you may also need to treat with certain other medications.

If you are using epsom salt dip for betta constipation, you may need to dip it a few times to get things going. Dropsy and swim bladder disease are more serious conditions and should be treated with appropriate medication depending on the cause.

Epsom salt can be used to treat many ailments that affect betta fish, including dropsy, swim bladder disease, and constipation. However, you should not overexpose them to epsom salt, as this may harm them.

Severely diseased bettas should be treated twice with epsom salts, while mildly diseased bettas should be treated with epsom salt bath once.

Frequently asked questions

How long does epsom salt take to act on betta fish?

It takes 5 to 8 minutes for epsom salt to act on betta fish.

When should you avoid using an epsom salt bath treatment for betta fish?

Avoid epsom salts if you have plants in your betta tank. Plants hate salt in water, so adding it may kill them.

Are epsom salts and aquarium salts same?

Epsom salts & aquarium salts are not the same, they have different chemical compositions.

What are the different types of tanks used in epsom salt treatment?

Quarantine tanks, revival tanks and main tanks.