Green Neon Tetra Care: Tank Setup, Diet, Tank Mates, Diseases & More!

If you’re looking for a colorful and lively addition to your aquarium, Green Neon Tetras might be the perfect choice for you. These small, vibrant fish are known for their bright green and blue hues and are a popular choice among aquarium enthusiasts. In this article, we’ll cover everything you need to know about caring for Green Neon Tetras, from their diet and habitat to their behavior and breeding habits.

Green Neon Tetra is a freshwater fish species that requires a minimum tank size of 10 gallons. They prefer a pH range of 5.5-7.5 and soft to moderately hard water. They are omnivorous and should be fed a varied diet of flakes, pellets, and live/frozen foods. Regular water changes and proper filtration are necessary for their well-being.

As someone who has kept Green Neon Tetras in my own aquarium, I can attest to their beauty and charm. These fish are active and playful, constantly swimming and exploring their environment. However, they do require specific conditions in order to thrive, so it’s important to educate yourself on their care requirements before bringing them home.

In this comprehensive guide, we’ll cover all the essentials of Green Neon Tetra care, including water parameters, tank size, feeding habits, and more. Whether you’re a beginner or an experienced aquarist, you’ll find valuable information and tips to help you provide the best possible care for your Green Neon Tetras.

Species Summary

If you’re looking for a colorful and lively addition to your aquarium, the Green Neon Tetra is an excellent choice. In this section, we’ll cover everything you need to know about this species.


The Green Neon Tetra is native to the blackwater streams and tributaries of the Amazon River Basin in South America. They can also be found in parts of Peru, Brazil, and Colombia.


With proper care, Green Neon Tetras can live up to 5 years in captivity. However, their lifespan can be affected by factors such as water quality, diet, and stress.


Green Neon Tetras are small, vibrant fish that measure around 1 inch in length. They have a bright green iridescent stripe that runs horizontally along their body, with a neon blue stripe below it. Their fins are transparent with a hint of yellow.


As mentioned, Green Neon Tetras are small fish, growing up to 1 inch in length. They are best kept in groups of at least 6, as they are social creatures that thrive in the company of their own kind.

Growth Rate

The growth rate of Green Neon Tetras can vary depending on their environment and diet. With proper care, they can reach their full size within a year.

Behavior & Temperament

Green Neon Tetras are peaceful and non-aggressive fish that make great community tank mates. They are active swimmers and enjoy having plenty of space to explore. They also like to hide in plants and other decorations, so be sure to provide plenty of hiding spots.

Male vs Female

It can be difficult to tell the difference between male and female Green Neon Tetras, as they look very similar. However, females are typically larger and rounder than males, especially when they are carrying eggs.

When I first added Green Neon Tetras to my aquarium, I was amazed by their vibrant colors and playful personalities. They quickly became one of my favorite fish to watch, and I always make sure to provide them with a happy and healthy environment. With the right care, Green Neon Tetras can bring a lot of joy and beauty to your aquarium.

Tank Setup

Setting up the perfect tank for your Green Neon Tetras is crucial to their health and happiness. Here are the key factors to consider:

Tank Size

The minimum tank size for Green Neon Tetras is 10 gallons, but we recommend going bigger if you can. A larger tank will provide more swimming space and a more stable environment. Plus, you’ll be able to keep more fish!


Green Neon Tetras prefer dim lighting, so avoid bright lights that can stress them out. Use a timer to simulate a natural day/night cycle and provide 8-10 hours of light per day.

Filtration & Aeration

A good filter is essential to keep the water clean and healthy for your fish. Look for a filter that can handle at least 5 times the volume of your tank per hour. Aeration is also important to provide oxygen for your fish. A simple air pump and air stone will do the trick.


Green Neon Tetras are tropical fish and require a water temperature of 72-80°F. A reliable heater is a must to maintain a consistent temperature.


Choose a substrate that is gentle on your fish’s delicate fins, like sand or small gravel. Avoid sharp or rough substrates that can cause injury.


Add some hiding places for your fish to feel secure, like caves or plants. Avoid sharp or rough decorations that can cause injury.


Live plants not only look great, but they also provide oxygen and help keep the water clean. Green Neon Tetras love plants to hide in and explore. Choose plants that are easy to care for, like Java Fern or Anubias.

When setting up your Green Neon Tetra tank, remember to take your time and do it right. Your fish will thank you for it!

Personally, I’ve found that adding a few floating plants to my Green Neon Tetra tank provides them with a sense of security and makes them more active and playful. Give it a try!

Water Quality

Proper water quality is essential for the health and well-being of your Green Neon Tetras. In this section, we’ll cover the key factors that affect water quality and how to maintain optimal conditions for your fish.

Water Temperature

The ideal water temperature for Green Neon Tetras is between 75-82°F (24-28°C). It’s important to maintain a consistent temperature to prevent stress and disease. Use a reliable aquarium thermometer to monitor the temperature and adjust your heater as needed.

Water pH

Green Neon Tetras prefer slightly acidic water with a pH between 6.0-7.0. Avoid sudden changes in pH as it can cause stress and harm to your fish. If your tap water has a high pH, consider using a pH regulator to adjust the water to the optimal range.

Water Hardness

Green Neon Tetras thrive in soft to moderately hard water with a hardness level of 4-8 dKH. Avoid using hard water as it can lead to health issues and affect the overall well-being of your fish.

Water Changes

Regular water changes are essential to maintain good water quality. Aim to change 20-30% of the water every week to remove toxins and waste products. Use a water conditioner to remove chlorine and chloramine from tap water before adding it to your aquarium.

From my personal experience, I’ve found that maintaining good water quality is the key to keeping Green Neon Tetras healthy and happy. By monitoring the water temperature, pH, and hardness, and performing regular water changes, you can create a thriving environment for your fish.

Tank Maintenance

Maintaining a healthy and clean environment for your Green Neon Tetras is crucial for their overall well-being. Here are some tips to keep your tank in top condition:

First, make sure to perform regular water changes. This will help remove any excess waste, uneaten food, and other debris that can accumulate in the tank over time. Aim to change about 25% of the water every two weeks.

Next, keep an eye on the water parameters in your tank. Green Neon Tetras prefer a slightly acidic pH level between 6.0 and 7.5, with a water hardness of 1-2 dH. Test the water regularly to ensure that these levels are maintained.

It’s also important to clean the tank regularly. Use an aquarium-safe sponge or scraper to remove any algae or buildup on the glass. Be sure to avoid using any harsh chemicals or soaps, as these can be harmful to your fish.

Finally, consider adding live plants to your tank. Not only do they add a natural aesthetic, but they also help absorb excess nutrients and provide oxygen for your fish. Just be sure to choose plants that are compatible with your Green Neon Tetras and that won’t overcrowd the tank.

Personally, I’ve found that regularly maintaining my tank not only keeps my Green Neon Tetras healthy, but it’s also a relaxing and enjoyable hobby. By following these simple tips, you can ensure that your fish thrive in a clean and healthy environment.

Tank Mates

If you’re planning to keep Green Neon Tetras, it’s important to know which fish species are compatible with them in the same tank. Here are some things to consider:

Compatible Fish Species

Green Neon Tetras are peaceful and small, so they do well with other small and peaceful fish species. Some good options include:

  • Ember Tetras
  • Corydoras Catfish
  • Otocinclus Catfish
  • Cherry Shrimp

These fish species have similar water requirements and are not aggressive towards each other, making them great tank mates for Green Neon Tetras.

Incompatible Fish Species

While Green Neon Tetras are peaceful, there are some fish species that are not compatible with them. These include:

  • Large Cichlids
  • Angelfish
  • Betta Fish
  • Gouramis

These fish species are generally larger and more aggressive than Green Neon Tetras, which can cause stress and even harm to the tetras.

How Many Green Neon Tetras Should Be Kept Together

Green Neon Tetras are social fish and should be kept in groups of at least six. This will help them feel more comfortable and reduce stress. In a larger tank, you can keep more Green Neon Tetras together, but be sure not to overcrowd the tank.

Personally, I’ve found that keeping Green Neon Tetras with Cherry Shrimp is a great combination. The shrimp add some variety to the tank and are fun to watch as they scurry around.


When it comes to Green Neon Tetra care, one of the most important aspects is their diet. In this section, we’ll cover what to feed your fish, how often to feed them, and some tips to ensure they get the nutrition they need.

What To Feed

Green Neon Tetras are omnivorous, which means they eat both plant and animal matter. In the wild, they feed on small insects and crustaceans, as well as algae and other vegetation. In captivity, you can feed them a variety of foods, including:

  • Flake or pellet food specifically designed for small tropical fish
  • Frozen or live brine shrimp, daphnia, or bloodworms
  • Vegetables such as blanched spinach, zucchini, or peas

It’s important to vary their diet to ensure they get all the necessary nutrients. You can also supplement their diet with treats like freeze-dried krill or plankton.


Green Neon Tetras should be fed 1-2 times per day, with small amounts of food each time. Overfeeding can lead to health problems and pollute the water in the tank. It’s best to feed them at the same time each day to establish a routine.


Here are a few tips to keep in mind when feeding your Green Neon Tetras:

  • Remove any uneaten food after a few minutes to prevent it from decomposing and polluting the water
  • Provide a variety of food to ensure they get all the necessary nutrients
  • Don’t overfeed – it’s better to underfeed than to overfeed

I’ve found that my Green Neon Tetras are particularly fond of live brine shrimp, and they get really excited when I add it to their tank. It’s fun to watch them dart around and gobble it up!

Common Diseases

As a Green Neon Tetra owner, you should be aware of the common diseases that can affect your fish. Here are some of the most common diseases, their symptoms, treatment, and prevention methods.


Green Neon Tetras are susceptible to various diseases, including:

  • Ich
  • Fin Rot
  • Columnaris
  • Velvet


Ich presents as white spots on the fish’s body and fins. Fin Rot is characterized by frayed or disintegrating fins. Columnaris causes a cotton-like growth on the fish’s mouth, fins, and body. Velvet is identified by a gold or rust-colored dust on the fish’s body.


If you notice any of these symptoms, it’s important to act quickly. You can treat Ich and Velvet by raising the temperature of the tank to 86°F and adding medication. Fin Rot and Columnaris can be treated with antibiotics or antifungal medication.


The best way to prevent diseases is to maintain a clean and healthy tank environment. Make sure to keep the water clean and properly cycled. Avoid overfeeding your fish and keep the tank at a consistent temperature. Quarantine new fish before introducing them to the tank to prevent the spread of disease.

Personally, I had to deal with Ich in my Green Neon Tetra tank. It was a stressful experience, but I was able to successfully treat it by following the proper steps. It’s important to be vigilant and take action as soon as you notice any symptoms to prevent the disease from spreading to other fish in the tank.

Signs of a Healthy Green Neon Tetra

If you’re a new Green Neon Tetra owner, you may be wondering how to tell if your fish is healthy. Here are some signs to look for:

  • The fish is swimming actively and energetically. A healthy Green Neon Tetra will swim around the tank, exploring its surroundings and interacting with other fish.
  • The fish’s color is bright and vibrant. Green Neon Tetras are known for their striking green and blue hues. If your fish looks dull or faded, it may be a sign of illness or stress.
  • The fish is eating regularly. A healthy Green Neon Tetra will have a healthy appetite and eagerly eat its food.

If you notice any of the following signs, it may be an indication that your fish is not healthy:

  • The fish is lethargic and not moving much. This can be a sign of illness or stress.
  • The fish’s color is faded or dull. This can be a sign of illness or stress.
  • The fish is not eating or eating very little. This can be a sign of illness or stress.

As a Green Neon Tetra owner, it’s important to keep an eye on your fish and monitor its behavior and appearance. By doing so, you can catch any potential health problems early and take action to keep your fish healthy and happy.

Personally, I find that observing my Green Neon Tetras is one of the most relaxing things I can do. Watching them swim around and interact with each other is mesmerizing and calming. It’s also rewarding to see them thrive under my care and attention.

Signs Your Green Neon Tetra Is Sick

If you’re a fish owner, you know how important it is to keep your fish healthy. Green Neon Tetras are no exception. Here are some signs to watch out for that may indicate your fish is sick:

  1. Changes in Appearance: If your Green Neon Tetra is looking dull or discolored, it could be a sign of illness. Additionally, if the fish is losing scales or has sores on its body, it may be suffering from a bacterial or fungal infection.
  2. Changes in Behavior: If your fish is suddenly hiding or not swimming as much as usual, it could be a sign of illness. Additionally, if your fish is gasping for air at the surface of the water, it could be a sign of poor water quality or a respiratory infection.
  3. Loss of Appetite: If your fish is not eating, it could be a sign of illness. Additionally, if your fish is eating but still losing weight, it could be a sign of a parasite or other internal infection. If you notice any of these signs, it’s important to take action quickly. The first step is to check the water quality in your aquarium. Poor water quality can cause a variety of health problems for fish. If the water quality is good, it may be necessary to treat your fish with medication. Be sure to research the appropriate medication and dosage for your specific fish species.

Personally, I had a Green Neon Tetra that suddenly became lethargic and stopped eating. I quickly noticed that the other fish in the tank were also acting strangely. After testing the water quality, I discovered that the ammonia levels were dangerously high. I immediately did a water change and added some beneficial bacteria to the tank. Within a few days, all of the fish were back to their normal, active selves. It’s important to always keep an eye on your fish and be proactive about their health.


If you’re interested in breeding Green Neon Tetras, there are a few things you need to know to ensure the best possible outcome. Breeding can be a rewarding experience, but it requires careful planning and attention to detail.

Breeding Setup

Before you start breeding, you need to set up the right environment for your Green Neon Tetras. You’ll need a separate breeding tank that is at least 10 gallons in size.

Make sure the tank is well-filtered and heated to a temperature of around 78-82°F. You’ll also need to provide plenty of hiding places for your fish, such as plants, rocks, and caves. This will help to reduce stress and increase the chances of successful breeding.

How To Breed

Once your breeding tank is set up, you can introduce your breeding pair. It’s best to choose a male and female that are healthy and mature, and have been well-fed in the weeks leading up to breeding.

You can encourage breeding by increasing the temperature of the tank by a few degrees, and by providing a nutritious diet of live or frozen foods.

Green Neon Tetras are egg scatterers, which means that they will lay their eggs on plants or other surfaces in the tank. Once the eggs have been laid, the male will fertilize them.

The eggs will hatch in around 24-36 hours, and the fry will become free-swimming after a few days. It’s important to remove the parents from the tank once the eggs have been laid, as they may eat the eggs or fry.


Once the fry are free-swimming, you’ll need to provide them with a nutritious diet of baby brine shrimp or other suitable foods.

You’ll also need to monitor the water quality in the tank carefully, as the fry are sensitive to changes in water chemistry. Regular water changes and the use of a good quality filter will help to keep the water clean and healthy for your fry.

Remember, breeding Green Neon Tetras can be challenging, but it can also be a rewarding experience. With the right setup, care, and attention, you can successfully breed these beautiful fish and enjoy watching your fry grow and thrive.

Personally, I found breeding Green Neon Tetras to be a fascinating and rewarding experience. It was amazing to watch the eggs hatch and the fry grow, and it gave me a greater appreciation for these beautiful fish. If you’re thinking about breeding Green Neon Tetras, I highly recommend giving it a try!

Product recommendations for Green Neon Tetra:

  1. Hikari Micro Pellets – This is a high-quality fish food that is perfect for Green Neon Tetra. It contains all the essential nutrients that your fish need to stay healthy and vibrant.
  2. API Aquarium Test Kit – It is important to keep an eye on the water quality in your aquarium, and this test kit makes it easy to do so. It includes tests for ammonia, nitrite, nitrate, and pH.
  3. Seachem Prime – This is a water conditioner that helps to detoxify ammonia, nitrite, and nitrate in your aquarium. It is safe for use with Green Neon Tetra and other freshwater fish.
  4. Fluval Plant and Shrimp Stratum – This substrate is perfect for creating a natural environment for your Green Neon Tetra. It contains essential minerals and is easy to maintain.
  5. AquaClear Power Filter – This filter is highly effective at removing debris and maintaining water quality in your aquarium. It is also very quiet and easy to maintain.
  6. Aqueon Aquarium Water Changer – This device makes it easy to perform regular water changes in your aquarium. It is designed to be safe and easy to use, and can help to keep your Green Neon Tetra healthy.
  7. NICREW ClassicLED Aquarium Light – This LED light is perfect for illuminating your aquarium and showcasing your Green Neon Tetra. It is energy-efficient and easy to install.
  8. Seachem Flourish Excel – This is a liquid carbon supplement that is perfect for promoting healthy plant growth in your aquarium. It is safe for use with Green Neon Tetra and other freshwater fish.


Caring for Green Neon Tetras can be a rewarding experience for any fish enthusiast. By following the tips and guidelines discussed in this article, you can create a healthy and thriving environment for your fish.

Remember to maintain proper water conditions, provide a balanced diet, and keep the tank clean. You should also consider adding plants and decorations to the tank to create a natural and visually appealing habitat for your fish.

If you are new to fishkeeping, don’t be discouraged by the amount of information presented in this article. With a little practice and patience, you can become a successful Green Neon Tetra owner.

Personally, I have found that caring for Green Neon Tetras has been a relaxing and enjoyable hobby. Watching these small, colorful fish swim around in their tank is a great way to unwind after a long day.

Thank you for taking the time to read this article. We hope that you have found it informative and helpful in caring for your Green Neon Tetras.


If you’re thinking of adding Green Neon Tetras to your aquarium, you probably have some questions. Here are some of the most frequently asked questions about Green Neon Tetra care:

How many Green Neon Tetras can I keep in my aquarium?

The general rule of thumb is to have one inch of fish per gallon of water. Green Neon Tetras grow to be about an inch long, so you can keep about 10 in a 10-gallon tank. However, it’s important to consider the size of your tank, the filtration system, and the other fish in your aquarium when determining how many Green Neon Tetras to keep.

What should I feed my Green Neon Tetras?

Green Neon Tetras are omnivores and will eat a variety of foods. You can feed them flakes, pellets, frozen or live foods such as brine shrimp or bloodworms. It’s important to vary their diet and not overfeed them.

What is the ideal water temperature for Green Neon Tetras?

Green Neon Tetras are tropical fish and prefer a water temperature between 75-82°F (24-28°C). It’s important to maintain a consistent temperature and avoid sudden changes.

Do Green Neon Tetras need a lot of light?

Green Neon Tetras do best in a well-lit aquarium, but they also need some shaded areas to rest. You can provide plants and decorations to create hiding spots for them.

Can Green Neon Tetras live with other fish?

Yes, Green Neon Tetras are peaceful fish and can live with other non-aggressive species. It’s important to choose fish that have similar water temperature and pH requirements.

Personal Anecdote: I have kept Green Neon Tetras in my aquarium for several years now and they have been a joy to watch. They are active and colorful, and they get along well with my other fish. I highly recommend them to anyone looking for a peaceful and easy-to-care-for fish.

Reference: Wikipedia.


Hi there! My name is Jacob, and I'm the founder of this Pet people blog that talks all about aquarium and fishkeeping. I've been passionate about fish and aquatic life since I was a kid, and I've spent countless hours learning about different species, their habitats, and how to create the perfect environment for them to thrive in.

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