Spirulina For Betta Fish (A Complete Guide)

There are many reasons why people give their fish spirulina, but the most common reason why is to improve the coloration. Betta fish are popular because they can come in nearly every color of the rainbow. If you have a betta fish, you may be wondering if it can have spirulina.

On this page, we’re going to discuss what fish owners should know about spirulina for bettas. We will discuss whether or not they can have it and everything else you should know. Keep reading to learn more about spirulina for bettas.

Key Takeaways:

  • Spirulina enhances the vibrant coloration of Betta fish, thanks to its natural pigments.
  • It provides beneficial proteins and boosts the immune system in Betta fish.
  • Although good for Betta fish, Spirulina should not be the main food source due to their carnivorous nature.
  • When feeding Betta fry, Spirulina lacks adequate protein for their growth but can be mixed with other protein sources.
  • It is recommended that Spirulina constitutes only 5 to 10 percent of a Betta’s diet as a supplement, not the primary nutrient.

Is Spirulina Good For Betta Fish?

Spirulina is known for its many health benefits, but is it good for betta fish too?/ask Yes, spirulina can have many great benefits for betta fish, along with many other fish. The main benefit that bettas receive from spirulina is that it keeps their colors bright and vivid.

Along with excellent coloring, spirulina also has many proteins that are healthy for fish to consume. Many fish owners also feed bettas spirulina because it’s known to boost the immune system and fight off bacteria. This is a great way to prevent problems before they have a chance to occur.

However, spirulina should not be the main food source for betta fish. This is because spirulina is derived from a plant, and bettas are carnivores. 

Can We Feed Spirulina To Betta Fry?

Spirulina doesn’t have enough protein to be part of a betta fry’s regular diet. Young betta fish are growing at a rapid rate, so they need more protein and nutrients to keep up. Unfortunately, spirulina doesn’t have what betta fry needs to grow at a healthy rate.

This doesn’t mean that spirulina is 100% off the table. It is okay to feed betta fry spirulina only if it’s mixed with a protein that is healthy for carnivores. For example, you may be able to find frozen brine shrimp that have been coated with spirulina or a mixture of beef heart with spirulina. 

Green Siamese fighting fish isolated on blue background.

How Much Spirulina Should I Feed My Betta Fish?

While spirulina has many great health benefits for betta fish, it’s not a necessary part of its diet. For that reason, spirulina should be looked at as a treat and not the main nutrient. Only allow spirulina to make up 5 to 10 percent of a betta’s diet. Betta fish need to get most of their nutrients from animal-based proteins. 

Spirulina should only be given to a betta fish 2 to 3 times a day and only be given in limited amounts. If you give too much spirulina to your betta, it won’t get eaten and will sit around the tank, causing bacteria to grow.

Even though spirulina isn’t a part of a betta fish’s diet, it’s important to remember that the betta fish will still consume algae in the wild. That is why eating a limited amount of spirulina is good for them.

How Do You Feed Spirulina?

One of the best ways to feed your betta spirulina is to give them fish food that already contains it. This will ensure that your betta still receives all the protein, minerals, and other nutrients it needs for a well-balanced diet. Many fish flakes contain spirulina, and there is also the option to buy brine shrimp in spirulina.

However, if you can’t find any fish food for bettas that contains spirulina, you aren’t out of luck. You can still use spirulina flakes that are formulated for herbivore fish. Add a very small amount to the water when you feed your betta. Don’t add too much to the tank, or else you risk over-feeding the betta.

Check out this video on Spirulina for Bettas!


Does Spirulina Enhance Fish Color?

Spirulina is used to help maintain and enhance the color of fish. It is effective for betta fish, koi, goldfish, tropheus, and more. Spirulina is able to enhance the color of fish because it naturally contains 5 ppt carotenoid pigments. This is a concentrated substance found in algae and is the healthiest way to improve coloring.


Is spirulina for bettas healthy? Spirulina is a good ingredient to give to betta fish because it can improve their colors and boost their immune systems. Betta fish come in a variety of colors, which is part of the reason these fish are so appealing. One of the easiest ways to keep their colors vivid is with spirulina. Fish owners don’t mind because it’s a natural ingredient.

Just because a betta fish can consume spirulina doesn’t mean it’s an essential part of its diet. Betta fish are carnivores, so they require an animal-based protein to get all of their nutrients. For this reason, spirulina should only be given to the fish in small portions as a treat. Never allow the betta fish to fill up on spirulina instead of an animal protein.


  • https://www.bettafish.com/threads/is-spirulina-ok-to-feed-bettas.783195/
  • https://piscespros.com/spirulina-fish-food/
About the author

Hey there! I'm Antonio, the passionate owner and chief editor of Betta Care Fish Guide. With over half a decade of hands-on experience, I've become your go-to expert for all things betta and tropical fish.

Over the past 5 years, I've not only kept bettas and other tropical fish but also connected with a diverse network of hobbyists, seasoned fishkeepers, and even veterinarians.

Now, I want to help other beginner fish keepers who had the same questions as me when they were just starting out! So they can save themselves a ton of time and keep their fish happy and healthy!