Neon Tetra
Paracheirodon innesi
Neon Tetras exhibit striking iridescent blue bodies with a bright red stripe along the lateral line, making them popular in aquariums.
This page includes AI-generated images. Why am I seeing AI images?
About the Neon Tetra
The Neon Tetra is a small, brightly colored fish known for its vibrant blue and red stripes that run the length of its body. It is a favorite among aquarists due to its striking appearance and peaceful nature. Neon Tetras are schooling fish that thrive in groups, adding a lively and colorful presence to any aquarium.
Quick Facts
Size
1.5 inches
Temperament
Peaceful
Difficulty
Beginner
Min Tank Size
10 gallons
Lifespan
5-10 years
Origin
South America
Diet
Omnivore - flakes, small pellets, brine shrimp, daphnia
Water Parameters
20-27°C
5-7.5
1-10 dGH
Need a heater for this species?
This species needs 20-27°C in a 10 gallon tank. Use our heater calculator to find the right wattage.
Calculate heater sizeCare Notes
- Neon Tetras thrive in a planted aquarium with subdued lighting, a dark substrate, and plenty of cover (plants/wood/decor). A typical temperature range is about 20-26°C (often kept around 21-27°C for general care).
- Maintain water quality with a pH level between 6.0 and 7.0 and regular water changes, as they are sensitive to fluctuations in water parameters.
- Feed Neon Tetras a varied diet of high-quality flake food, small pellets, and occasional live or frozen foods like brine shrimp or daphnia to ensure balanced nutrition.
- These peaceful schooling fish should be kept in groups of at least six to eight, which can help reduce stress and allow them to display natural behaviors.
- Ideal tank mates for Neon Tetras include other small, peaceful community fish (small tetras/rasboras/danios) and gentle catfish like Corydoras. Avoid larger predatory fish that can eat them; also avoid known fin-nippers and overly boisterous tankmates.
- Neon Tetras can spawn in home aquariums; provide soft, slightly acidic water and dim lighting to encourage breeding, and use a separate breeding tank to protect the eggs from adult fish.
- Watch for common health issues such as Neon Tetra Disease, identified by changes in color and swimming patterns; swift isolation of affected fish is crucial to prevent the spread.
Compatibility
Good Tankmates
- Other peaceful community fish like ember tetras or cardinal tetras
- Small rasboras like harlequin rasboras
- Corydoras catfish, which are gentle and thrive in similar water conditions
- Peaceful bottom dwellers like kuhli loaches
- Small, non-aggressive invertebrates like cherry shrimp
- Warning: Long-finned fish (e.g., guppies) can be stressed by fin-nippers; compatibility varies by individual fish and tank conditions.
Avoid
- Fin-nipping or aggressive fish (many barbs, some larger/boisterous species)
- Large cichlids that may view Neon Tetras as prey
- Territorial fish like certain gouramis
Habitat and Natural Environment
Neon Tetras (Paracheirodon innesi) are native to the clearwater and blackwater streams of the Amazon Basin in South America. They thrive in warm, soft, and acidic waters that are densely vegetated.
Neon Tetras prefer environments that replicate their natural habitat, which include plenty of plants, roots, and driftwood.
Tank Setup Requirements
A well-planted aquarium with a soft substrate and low to moderate water flow is ideal for Neon Tetras. They require a heater to maintain water temperature between 70-81°F (21-27°C) and a pH of 6.0-7.0.
- Tank Size: Minimum of 10 gallons
- Water Hardness: 1-10 dGH
- Lighting: Low to moderate
Neon Tetras are schooling fish and should be kept in groups of at least six for optimal health and well-being.
Feeding and Diet
Neon Tetras are omnivorous and require a balanced diet consisting of both plant and animal matter. High-quality flake food, micro-pellets, and live or frozen foods like brine shrimp and daphnia are ideal.
Feed them small amounts two to three times daily, ensuring they consume the food within a few minutes.
Behavior and Temperament
Known for their peaceful nature, Neon Tetras are active swimmers and get along well with other non-aggressive fish. Their vibrant colors and shoaling behavior make them a popular choice for community tanks.
Avoid housing Neon Tetras with larger, aggressive fish that may see them as prey.
Breeding
Breeding Neon Tetras can be challenging but rewarding. They require specific conditions to spawn, including very soft water and subdued lighting.
- Spawning tank with a mesh or marbles to protect eggs
- Water temperature: 75-76°F (24-25°C)
- Dimming or black-out curtains for darkness
Separate the parents from the eggs after spawning to prevent them from eating the eggs.
Health and Common Issues
Neon Tetras are relatively hardy but can be susceptible to common freshwater diseases such as Ich and Neon Tetra Disease, which is a type of microsporidian disease.
Neon Tetra Disease is not treatable. Infected fish should be removed immediately to prevent spreading.
- Conduct regular water changes to maintain high water quality.
- Monitor for common symptoms such as fading colors, erratic swimming, or loss of appetite.
- Quarantine new fish before adding them to the tank.
Similar Species
Other freshwater peaceful species you might be interested in.
Ajuricaba tetra
Jupiaba ajuricaba
Jupiaba ajuricaba is a South American freshwater characin from the Amazon basin in Brazil (rio Negro, rio Solimões, and rio Tapajós basins). It reaches about 9.5 cm SL and is diagnosed by a narrow dark midlateral stripe, an elongated humeral spot, and an ocellated spot on the upper caudal-fin lobe. Wild specimens have been collected from blackwater forest streams and also oxbow-lake habitats.
Amapa tetra
Hyphessobrycon amapaensis
This is a tiny, super sleek little tetra with a clean red stripe down the side that really pops once its settled in. It does best in a planted, slightly tinted "creek-style" setup and looks way cooler when you keep a proper group so they school and flash that line together. If you can give it soft, slightly acidic water and a calm community, its an easy fish to fall for.
Anteridorsal Homatula loach
Homatula anteridorsalis
This is a benthic Chinese stream loach from Yunnan that lives right down on the bottom in clear, flowing water over gravel and rocks. Think of it as a "river tank" fish - it wants current, oxygen, and lots of surfaces to poke around on for bits of food and algae.
Armoured stickleback
Indostomus paradoxus
This is that goofy little "freshwater seahorse"-looking fish that just kind of perches and scoots around like a tiny armored twig. Its whole vibe is slow, sneaky micropredator - once its settled in, you will catch it stalking microfoods and doing these subtle little posture displays. The big trick is feeding: they do best when you can provide lots of small live foods in a calm, planted tank.
Arnegard's electric fish
Petrocephalus arnegardi
This is a little Congo River elephantfish (a weakly electric mormyrid) that cruises the lower parts of the tank and navigates the world with its electric sense. It stays small (around 9 cm) and has a clean silvery look with three dark marks that make it pretty easy to pick out among Petrocephalus.
Aroa twig catfish
Farlowella martini
Farlowella martini is one of those unreal-looking stick catfish that just vanishes the moment it parks itself on a branch. It is a super calm, slow-moving grazer that does best in a mature tank with lots of biofilm, gentle flow, and clean, oxygen-rich water - they are not great at competing at feeding time, so you kind of have to look out for them.
More to Explore
Discover more freshwater species.
American flagfish
Jordanella floridae
Jordanella floridae is that little Florida native with the red-and-cream striping that really does look like a tiny flag once a male colors up. They graze algae like champs (especially stringy/hair algae), but they have a bit of attitude - give them plants and space so the bossy behavior stays manageable. Bonus: the male guards the eggs and will actively fan them, which is pretty fun to watch.
Amur sculpin
Alpinocottus szanaga
This is a little coldwater sculpin from the Amur drainage - a bottom-hugging, rock-and-gravel fish that spends its day wedged under stones and darting out to grab food. Super cool behavior and attitude, but it is absolutely not a warm tropical community fish - it wants chilly, fast, oxygen-rich water and will bicker with other bottom fish.
Anitápolis livebearer
Jenynsia weitzmani
Jenynsia weitzmani is a freshwater anablepid livebearer endemic to southern Brazil (currently known only from the type locality near Anitápolis, Santa Catarina). Like other Jenynsia (onesided livebearers), reproduction involves lateralized mating morphology/behavior; aquarium care guidance is not well-documented for this species specifically.
Aracu-comum
Schizodon vittatus
Schizodon vittatus is a large South American anostomid (family Anostomidae). Reported maximum size is about 35 cm standard length; it is harvested/consumed in parts of Brazil and is not commonly covered by mainstream aquarium husbandry references.
Arraya's bluntnose knifefish
Brachyhypopomus arrayae
This is a weakly-electric South American knifefish that cruises around plants and root mats and does most of its business after lights-out. It is a pretty subtle-looking fish (more earthy browns than flashy colors), but the cool part is the whole electric-sense lifestyle and that smooth, hovering knifefish swim.
Arrowhead puffer
Pao suvattii
Pao suvattii is that sneaky Mekong puffer that likes to sit low and ambush food, and it has that super recognizable arrow/V pattern on its back. Gorgeous fish with tons of personality, but it is absolutely not a community guy - plan on a solo, species-only setup if you want everybody to stay in one piece.
Looking for other species?