Cookies seem to be disabled in your browser, therefore this website will NOT work properly! Please, consider enabling Cookies in order to maximise your user experience while browsing.
Recent discussions at Aqua-Fish+
  1. TheFishWorks at A guide on growing aquarium plants with FAQ, forum and species on
  2. Salviashaman at A guide on caring for Congo tetra (Phenacogrammus interruptus) on …display more of the recent discussions
  3. Salviashaman at A guide on setting a South American blackwater stream biotope aquarium on
  4. Figureguy at Chemistry of Aquarium Water with FAQ on
  5. Jackson20 at A guide on feeding aquarium fish frozen foods on
  6. Senator Wisdom at Bloodfin tetra (Aphyocharax alburnus) on
  7. CayceR at A page and forum devoted to keeping Blood parrot cichlids on
  8. Ness at A guide on raising African Dwarf Frogs with pictures and forum on
  9. Terry Mitchell at A guide on breeding, feeding and caring for L333 Pleco on
  10. Terry Mitchell at A guide on breeding, feeding and caring for L333 Pleco on

The Neon tetra - Forum & Guide on care, feeding, breeding

Neon tetra, picture 1 Neon tetra, picture 2 Neon tetra, picture 3 Neon tetra, picture 8 Neon tetra, picture 5

Brief Description

This is an ultimate guide on raising Neon tetras in fish tanks, breeding them, taking care of fry and basically every aspect of keeping this species. We'd love to hear about your Neon tetras and your experiences with these fish, so submit your story at the bottom of this page, please! You should also visit the following pages: Neon tetra profile with forum, Black neon tetra (similar species), Green neon tetra (another similar species) and Neon tetra disease!

Introduction – Requirements, Tank Setup and “Must Know” Facts

Neon tetras (known under the scientific name scientific name Paracheirodon innesi) belong to the family called Characins, and they’re one of the most known tropical aquarium fish around the world that grow up to 4 cm (1.57 inch) in length, prefer slowly moving waters and love subdued light. They come from South America’s moderate sized rivers, southeast Colombia and eastern parts of Peru, where the water is usually dark-yellow or dark-brown. These fish are peaceful, non-territorial and schooling species that do well in groups of 10 or more, they should never be kept as a single specimen in a tank as they rely on each other to help them settle and alert each other of any danger. It’s important to emphasize this fact as many aquarists are often misinformed, thus their fish suffer. Recommendations such as 3 or 5 Neon tetras per tank should be ignored!

Conditions in the tank

Neutral or slightly acidic water (pH 6.5 - 7) of stable temperature that is somewhere between 20 and 25°C (68-77°F) is acceptable for these fish, general water hardness of 4-14°N dGH (71.43 - 214.29 ppm, 1.43 - 4.29 mEq) is another important value to think of when raising Neon’s. Bear in mind it’s crucial to monitor carbonate hardness since pH is stable when carbonate hardness is 4 or greater. Paracheirodon innesi will tolerate pH within range 5.5 – 7.5, but this value must not vary on a random basis.

Tank setup

For a typical neon tetra biotope the substrate should consist of a sandy bottom and scatter some almond leaves or similar around to give a realistic feel to the tank. Bogwood can be added to help keep the water acidic and this will also release tannins into the water giving it a yellowish tinge. Keep the lighting fairly subdued and add groups of plants but leave open swimming spaces at the front of the tank. Plants that are suitable for a Neon tetra tank are as follows: Tonina fluviatilis, Mayaca fluviatilis, Myriophyllum aquaticum, Heteranthera zosterifolia, Lilaeopsis brasiliensis, Hydrocotyle verticillata, Egeria densa, Echinodorus parviflorus, Echinodorus osiris, Echinodorus latifolius, Echinodorus amazonicus, Cabomba furcata. A display tank is preferred by keepers of these Tetras.

Pieces of bogwood and plants (dead or alive) will help to keep the water acidic, the bogwood will also release tannins into the water which will give a yellowish/brown tint to the colour of the water, providing these conditions should bring out the best colouration from the Paracheirodon innesi, subdued lighting and using a darker substrate will also help for the best possible colouration.

Optimum colouration for these fish is crucial as they are a shoaling fish and will communicate with their colours, if they are kept in unsuitable conditions then their colours will fade decreasing their ability to communicate to each other as well.

Tank size

Even though Neon tetras are very small fish they will still need a tank that is large enough to house 1 inch of fish per US gallon (0.83 Imperial gallon) of water (approximately 0.7 cm – 1 cm of fish length per liter), if you are keeping a large group of these, always bear this in mind. A 5 gallon tank (18.93 liters, 4.16 Imperial gallons) will only be capable of housing 5 neon tetras so such a tank really isn’t suitable; To keep the minimum of 10 fish you will need at least a 10 gallon tank (37.85 liters, 8.33 Imperial gallons). Raising this species in a fish bowl must be avoided unless a bowl is large enough (50 liters, 13 US gallons, 11 Imperial gallons) with plants, rocks and wood that designate orientation points.

Are Neon tetras fish for beginners?

Many aquatic stores sell these as beginners fish but this is a very bad practice as they mislead customers into thinking that they are an easy species to keep and are very hardy. This is just not true, they should never be added to a new tank setup, they should only be added to a tank that is fully cycled and the water has matured for at least two months. Often keepers will buy these fish and check the tank the next morning only to find that some of the neon tetras have disappeared!

If the water chemistry is not stable they can be quickly affected and will die off very quickly, often the bodies are hard to locate and sometimes the dead bodies can even be sucked into the filters due to their small size.

Temperament and Tank mates

Generally, Neon tetras are very shy which is noticeable if you keep only 2 or 3 of them. Roots of this behavior originate from their natural environment, size, position in the food chain - these fish are not predators, instead they try to group themselves in large shoals and hide from predators in roots or fallen wood in the rivers of South America which are naturally full of fallen wood, roots of trees and plants. Such an environment offers a lot of hiding places. If you place a few Neon tetras to a completely empty tank (that's filled with water only), they will suffer which leads to diseases and premature death.

Neon's are compatible with peaceful species of fish that are not a lot bigger than themselves. They do well with Corydoras, other species of the smaller Tetras and Rasboras. They are often seen kept with the incorrect tank mates such as Acara's, Paradise fish, Oscar's and the keepers couldn't understand why they are disappearing with no trace, if they did their homework and researched the species they would know why. Peaceful Pleco's are generally good tank mates for Neon tetras, even loaches such as Yoyo loach, Zebra loach, Horseface loach or Tiger hillstream loach can be kept with these tetras. Guppies, Mollies or Platies can be raised with Neon's too.

The neon tetra

Paracheirodon innesi can be even kept with Angelfish or mid-sized South American cichlids, however it's necessary to introduce all species to their new tank as juveniles. It's crucial to understand that Neon tetras are eaten by Angelfish in the wild, so combination of these doesn't have to work in all cases!

If you already run a community tank, feed your fish and turn off lights before adding your Neon's into the tank.

Nutrition - Diet

Firstly, neon tetras are omnivores. They will eat brine shrimp, a good quality flakes, small granules, small live or frozen food, or tubifex. Feeding should be provided at least two times a day, the Neon's only have very small stomachs so only offer them very small meals each time. Only offer them the amount that they can eat in 5 minutes, excess food will rot and spoil the water quality in the tank.

Aquarists are often misled by inexperienced shop assistants and believe that Neon’s eat plants – this is incorrect, your plants are 100% safe with Neon tetras.

Sexing and Breeding

Sexing these fish can be difficult in itself but the females will have a rounder belly shape and looking at the lateral line, the males will display a straight line whereas the females will be slightly bent, this can be seen a lot more clearly if she is full of eggs.

Neon Tetras can be quite a difficult species of fish to breed however they are successful in the fish farms if Asia. In the wild they are prolific breeders but this skill doesn’t seem to happen very often in the aquarium. Usual batch contains 30-50 eggs per spawn.

Set up the breeding tank with an air driven sponge filter and add marbles in the bottom so that any fallen eggs will fall through the spaces. These fish show no parental care and will attempt to eat the eggs if given the chance. A few plants should be added (live or artificial) and ensure that the water is soft and acidic, the pH should be no higher than 6.8. Always use a lid on the tank, spawning Neon's will leap out of the water, you do not want to lose your fish at this stage. There should be no lighting and condition the parent fish on live or frozen foods until the female has started to swell with eggs. Spawning will take place at daybreak, once this has completed the parent fish can be removed and eggs should be stuck to the plants, the tank glass and in the marble substrate.

The eggs will hatch after 24 hours but keep the tank in darkness as the fry are light sensitive and this can bring on shock. They will consume their yolk sacs at first so do not offer them any food initially, once the sacs have been consumed they can be fed on Infusoria or a commercial fry food until they are large enough to accept newly hatched brine shrimp.

Colours and diseases

The Neon tetra is of dark olive-green colour combined with the silver-white and red. Usually, they lose the colours during the night hours, because the fish rest and at this time they are vulnerable in the wild so fading makes them less easy for the predators to see. When they become active, which is usually in the morning, the colours come back. If any fish is of poor health or the colours fade during the daytime, it’s the attribute of some disease. Please note, that any dramatic change to their environment could cause unpredictable behaviour or diseases.

Probably the most common disease is called ‘the neon tetra disease pleistophora‘. This disease roots in the microsporidian parasite which enters the fish after consuming some infected material or through open wounds. The major symptoms are restlessness, losing the colours, swimming problems. The only ’treatment’ means removing the sick fish. Diatom filter may reduce the number of parasites in the tank. We have an article devoted to this disease here: Neon tetra disease – symptoms, prevention and forum.


Provided by Mihail of Romania.

Neon tetra, picture 1 Neon tetra, picture 2 Neon tetra, picture 3 Neon tetra, picture 8 Neon tetra, picture 5

Additional questions and answers - About Neon tetras

On March 19th 2011 we merged all Neon tetras - related questions from with this article in order to put similar topics onto a single page. If you cannot find answer on your questions, feel free to use a form which can be found at the bottom of this page and ask us, please. Some of the below-listed questions may be partially answered on this page already.

  • Why are my neon tetras so shy?

    Answer: Neon tetras are a very misunderstood species of fish. In many pet stores they are labeled as ideal for beginners. The neon tetra is classed as a timid fish and should be given hiding places in the aquarium if it feels the need to be out of the limelight for a while.

  • Why are neon tetras so fragile?

    Answer: Neon tetras are classed as a timid fish and demand the best water quality in the aquarium. They should never be added to immature tanks.

  • What do you do when your neon tetras lay eggs?

    Answer: The plant where are eggs should be moved to another tank (or vice-versa, move the parents and other fish which are in the tank) in order to avoid the fry from being eaten. Then feed the fry Artemia salina.

  • Why do my neon tetras panic when the aquarium lights go off?

    Answer: In their natural habitat the neon tetras will look for hiding places at nighttime to escape predation. This instinct is still performed in the aquarium.

  • What water conditions do neon tetra like?

    Answer: Neon tetra need slightly acidic, soft water conditions - pH 6.8 and kept at a temperature of 24 °C (75.20°F). They should never be added to a new tank set up as they require mature water to live happily.

  • What level of the aquarium do neon tetras usually live in?

    Answer: These fish will swim in all levels of the aquarium, and they love space so a large aquarium with lots of hiding spaces and plants will be appreciated.

  • What size fish tank should I get for breeding neon tetras?

    Answer: Neon Tetras do not need a large tank for breeding. 10 gallons (37.85 liters, 8.33 Imperial gallons) will be large enough for this purpose.

  • Why do my tetras chase each other?

    Answer: This is their way of playing which means the fish are happy in the tank you have provided for them.

  • Why doesn’t the coloration on my tetras show up?

    Answer: This is a classic case of the fish not being happy with the tank environment. When the fish is in full color they are well at ease.

Other webpages devoted to Neon tetras; Outside of Aqua-Fish.Net

If you've finished with the article and all comments that can be found below, feel free to visit the following pages, they're devoted to Neon tetras in home fish tanks; Neon Tetra @ AquaticCommunity.Com, Neon Tetra - Paracheirodon innesi @ AquaHobby.Com, Robyn's Neon Tetra Page @ FishPondInfo.Com, Neon Tetra - Paracheirodon innesi @ FishLore.Com, Paracheirodon innesi - Neon Tetra @ SeriouslyFish.Com, Neon Tetra, Paracheirodon innesi @ Animal-World.Com. If any of the links doesn't work, contact us, please!

Please, verify whether your login and password are valid. If you don't have an account here, register one free of charge, please. Click here to close this box.

You have been logged out successfully! This box will close automatically!

Something went wrong during processing your message, please try again!

Your message has been sent, thanks a lot!

Page has been saved, refresh it now, please!

The page has been created, you will now be redirected!

URL already exists!

Path to the photo is not unique!

Really delete this page from the database?

The page has been removed successfully, you will be redirected now!

The page couldn't be deleted!!

Unfortunately this page doesn't allow discussion. Please, find any other page that fits your area of interest as over 99% of our pages allow discussion. The reason why no discussion is allowed here is this page is too general. Thanks a lot for understanding! Click here to search, please!

Really delete this comment from the site?

Really delete this image from the site?

Really delete this image from the site?

Selected comment has been removed successfully!

Selected image has been removed successfully!

Either login or email address is required

Account has been recovered, please check your email for further instructions