GloFish Betta – Bold Colors, Big Personalities

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As an avid fish keeper, I am always on the lookout for new and interesting species to add to my collection.

Recently, I stumbled upon the GloFish Betta and was immediately intrigued.

These fish are a unique addition to any aquarium, with their vibrant colors and distinct glowing appearance.

Originally created through genetic modification, GloFish Betta are a variation of the popular Betta fish species. 

While some people may have concerns about the ethics of genetically modified animals, it’s important to note that these fish are bred in a safe and controlled environment.

They are no different from their non-modified counterparts in terms of care requirements.

If you’re considering adding a GloFish Betta to your aquarium, there are a few things you should know.

In this article, I will provide a complete care guide for these fish, covering everything from their habitat and tank requirements to their diet and behavior.

Whether you’re a seasoned fish keeper or a beginner, this guide will help you provide the best possible care for your new GloFish Betta.

Glofish Betta Ethics

There is no harm taking place and fish are not hurt in this process.

These fish are genetically modified and are not injected or dyed with artificial colors like glass fish presently are.

Scientists take genes from jellyfish and sea anemones and inject them into the already fertilized eggs.

There is nothing immoral about Glofish and it is more a matter of taste then anything else.

You either love them or hate them and this is your choice.

Origin and History

This fish is a unique and colorful addition to any aquarium.

The GloFish Betta is a genetically modified fish that has been engineered to produce fluorescent colors.

The fish is a result of years of research and development by scientists who were looking for a way to create a more visually appealing fish.

The first GloFish was created by inserting fluorescent genes obtained from sea anemones and jellyfish into the eggs of a black and silver Zebra danio.

The genes produce color proteins that fluoresce, producing that famous fluorescent color.

The first GloFish available in pet stores were zebrafish (Danio rerio).

These fish were a hit with aquarium enthusiasts, and soon the company began to produce other species of fish, including tetra (Gymnocorymbus ternetzi), tiger barbs (Puntius tetrazona), Rainbow Shark (Epalzeorhynchos frenatum), and Siamese fighting fish (Betta splendens).

The GloFish Betta is one of the latest additions to the GloFish family.

The GloFish Betta has gained in popularity in recent years due to its unique and striking appearance.

Appearance, Colors and Size

GloFish Bettas are small, colorful fish.

They are typically between 2 and 3 inches long and have long, flowing fins that make them look elegant and graceful.

The males are usually larger and more colorful than the females, with more vibrant colors and longer fins.

One of the most striking things about GloFish Bettas is their colors.

They come in a variety of bright, fluorescent colors that are sure to catch your eye.

Some of the most common colors include red, green, blue, orange, yellow, and pink.

These colors are not natural, but rather the result of selective breeding and genetic modification.

The fish have been genetically engineered to produce a protein that makes them glow under certain lighting conditions.

Their bright colors make them a popular choice for aquarium enthusiasts, as they add a pop of color to any tank.

They are also great for aquascaping, as they can be used to create a focal point or to add contrast to other plants and fish in the tank.

Behavior and Temperament

The GloFish Betta is known for its active and curious behavior.

They are highly intelligent fish and can even learn to recognize their owners over time.

However, GloFish Bettas are also known for their aggressive behavior towards other fish, particularly males of the same species.

This is due to their territorial nature and their history of being bred for fighting.

Therefore, it is important to carefully consider tank mates when keeping a GloFish Betta and ensure that they are peaceful and do not pose a threat to the betta’s well-being.

When kept in a suitable environment with compatible tank mates, GloFish Bettas can exhibit a range of fascinating behaviors.

They enjoy exploring their surroundings, hiding in caves or plants, and interacting with their owners.

Tank Size and Water Parameters

When it comes to keeping GloFish Betta, tank size and water parameters are crucial for their health and well-being.

As a responsible fish owner, make sure to research and understand the ideal conditions for your Glofish Betta.

The minimum tank size for a GloFish Betta is 5 gallons.

However, go for a larger tank to provide your fish with more swimming space and to avoid overstocking.

A 30-gallon aquarium is recommended if you plan to keep a community tank with a GloFish Betta and other fish species.

It’s important to note that the water parameters in the tank should be closely monitored and maintained.

The temperature for GloFish Betta is between 72° and 81° Fahrenheit, with an average temperature of about 75° being ideal.

A water heater is helpful for maintaining the correct temperature.

In addition to temperature, other water parameters to monitor include ammonia, nitrite, nitrate, GH, KH, and pH.

The recommended levels for these parameters are:

ParameterIdeal Level
Ammonia0 ppm
Nitrite<0.25 ppm
Nitrate<20 ppm
GH3-4 dGH (50-65 ppm)
KH3-5 dKH (52-90 ppm)

It’s important to test the water regularly to ensure that the levels are within the recommended ranges.

If any of the parameters are off, appropriate actions should be taken to correct them.

Overall, maintaining the right tank size and water parameters is crucial for the health and well-being of your GloFish Betta.

By following the recommended guidelines and regularly monitoring the water, you can ensure that your fish is living in a safe and comfortable environment.

Suitable Tank Mates

When it comes to choosing suitable tank mates for your GloFish Betta, you have to be careful.

Bettas are known to be aggressive towards other fish, especially those with long fins and bright colors.

However, there are some fish that can coexist peacefully with your GloFish Betta.

One of the best tank mates for your GloFish Betta is the Cory Catfish.

They are peaceful, active, and can tolerate the same water conditions as your betta.

They also come in a variety of colors and patterns that can add visual interest to your tank.

Another good option is the Dwarf Danio.

They are small, active, and have a similar temperament to the GloFish Betta.

They also come in a variety of colors, including blue and purple, which can complement the bright colors of your betta.

The Dwarf Rasbora is another suitable tank mate for the GloFish Betta.

They are peaceful, active, and have a similar diet and water requirements as your betta.

They also come in a variety of colors, including orange and green, which can add visual interest to the tank.

A single small pleco can also be a good tank mate for your GloFish Betta.

They are peaceful, active, and can help keep your tank clean by eating algae.

However, you have to be careful not to get a pleco that grows too large, as they can outgrow your tank and become aggressive towards your betta.

Short finned-tetras are also a good option for the GloFish Betta.

They are peaceful, active, and have a similar diet and water requirements.

They also come in a variety of colors, including red and green, which can complement the bright colors of your betta.

Overall, when choosing tank mates for your GloFish Betta, you have to be careful and considerate.

You need to choose fish that have a similar temperament, diet, and water requirements as the Glofish Betta.

By doing so, you can create a peaceful and harmonious community in your tank.

What to Feed Your Glofish Betta

When it comes to feeding your GloFish Betta, you want to make sure that you are providing them with a well-balanced diet that meets their nutritional needs.

Here are some options for feeding GloFish Betta:

Commercial Fish Foods

One option for feeding GloFish Betta is to use high-protein commercial fish foods.

High-quality betta pellets are a good choice, as well as freeze-dried meaty proteins such as bloodworms, and frozen meaty foods like daphnia, mosquito larvae, and brine shrimp.


Another option for feeding GloFish Betta is to use flakes.

GloFish special color flakes are available, but regular flake food is also suitable.

It is important to remember that GloFish Betta are the same as their non-fluorescent counterparts in terms of nutritional needs.

Live Food

Live food such as brine shrimp and bloodworms are also good options for feeding GloFish Betta.

However, take note that live food can carry diseases and parasites, so it is important to make sure the food is from a reputable source and properly cleaned before feeding.

Veggies and Algae Wafers

Occasionally, I like to supplement my GloFish Betta’s diet with veggies and algae wafers.

While these foods do not provide the same level of protein as meaty foods, they can be a good source of fiber and other nutrients.

It is important to avoid overfeeding with these foods, as they can cause digestive issues if your betta eats too much.

Overall, you need to provide a varied diet for your GloFish Betta to ensure they receive all the nutrients they need to thrive.

I like to rotate between different types of food to keep things interesting for my fish and make sure they are getting a well-rounded diet.

Breeding GloFish Betta

Breeding GloFish Betta can be a fun and rewarding experience for any fish enthusiast.

However, it is important to note that these fish must only be crossed with each other, as breeding them with other types of Betta fish can lead to health problems and deformities in the offspring.

Before attempting to breed GloFish Betta, it is important to ensure that they are mature enough for breeding.

Typically, GloFish Betta are ready for breeding at around 6 months old.

Once you have determined that your fish are ready for breeding, you will need to set up a breeding tank.

A breeding tank for GloFish Betta should be between 5-10 gallons in size.

It should be equipped with a heater to maintain a temperature of around 78-80°F and a filter to keep the water clean.

You will also need to provide plenty of hiding places for the female Betta, such as plants or decorations.

It starts with the male Betta building a bubble nest at the surface of the water.

This is where the female Betta will deposit her eggs, and the male Betta will fertilize them.

Once the eggs have been fertilized, the male Betta will take care of them until they hatch.

Monitor the breeding process closely and remove the female Betta once the eggs have been deposited.

This will prevent her from eating the eggs or attacking the male Betta.

Once the eggs have hatched, you will need to provide the fry with plenty of food, such as baby brine shrimp or crushed up flakes.

Overall, breeding GloFish Betta can be a fun and rewarding experience for any fish enthusiast.

Why You Should Consider This Fish

I think that if you like the look of this fish then it can be a great addition to your aquarium.

Not only is it visually stunning with its bright colors and unique appearance, but it also has interesting behaviors and characteristics that make it a joy to watch.

One thing to consider when adding a GloFish Betta to your aquarium is that it is a highly aggressive fish, especially towards other males of the same species.

It is important to provide them with ample space and hiding spots to prevent any conflicts.

Another important aspect to keep in mind is the tank requirements.

GloFish Bettas should be kept in tanks with a filtration system that is suitable for the aquarium volume.

A filter system is essential in any fish tank to keep the tank clean and reduce levels of harmful nitrates in the water.

The GloFish 20 Gallon Aquarium Kit is a great option for those looking for a complete setup.

Overall, the GloFish Betta is a unique and fascinating fish that is sure to bring joy and beauty to any aquarium.

With proper care and attention, this fish can thrive and become a beloved addition to your aquatic family.

When you bring your new addition home then make sure you transfer it properly from the cup to the tank –


How long do betta GloFish live?

Typically they can live between 2 to 4 years but a lot depends on their diet and the water quality in their tank.

Are GloFish bettas aggressive?

Glofish bettas are just like any regular betta fish. There should only be one male in the tank because they will fight if there is more than one. Female Glofish bettas can be kept in groups of at least 3 individuals.

How are GloFish bettas made?

They are genetically modified. After the eggs have been fertilized then they are injected with a protein found in jellyfish that cause the fluorescent color.

Do betta GloFish need special food?

you can feed them a special food made for Glofish betta but it is not a must. You can feed them any high quality betta fish food that contains a lot of protein.

What’s the difference between a GloFish betta and a regular betta?

The only difference is in the color. Glofish bettas are just regular bettas that have a fluorescent color inserted in the egg stage.

Photo of author


Irma Bense is the founder of She has over 42 years of experience in keeping fish.She has kept both freshwater and saltwater fish through the years.She has extensive knowledge in breeding numerous species of fish from Show Guppies, Cory Catfish, German Blue Rams to Apistogrammas.You can learn more about Irma on the 'About' page.

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