Lemon tetra
The lemon tetra is a characin from the Tapajos River basin in the Amazon region of Brazil. It is a long-established and popular aquarium fish. It has a translucent, lemon-yellow body that becomes more diamond-shaped and colorful in mature males, with bright yellow accents on the front rays of the anal and dorsal fins and striking red-topped eyes. Good conditions bring out its glowing yellow tones. This peaceful, active shoaling fish should be kept in groups of at least six to eight to feel secure and display natural behavior. It does well in a planted tank with soft, slightly acidic water and some open swimming room. It is an undemanding community fish that accepts flake, frozen, and small live foods, and can be bred in groups over fine-leaved plants.
Water parameters
| Temperature | 23 – 28 °C |
|---|---|
| pH | 5.5 – 7.5 |
| Carbonate hardness (KH) | 2 – 10 °dKH |
| General hardness (GH) | 3 – 12 °dGH |
Tank & stocking
| Minimum tank volume | 75 L |
|---|---|
| Volume budget per individual | 7 L — adds up with tank-mates |
| Minimum group size | 8 individuals (shoaling) |
“Minimum tank volume” is a reasonable floor, not an absolute limit. The per-individual budget is used by the Aqua app to estimate how heavily a tank is stocked.
Frequently asked questions
What size aquarium does Lemon tetra need?
Provide at least 75 litres for a small group to keep Lemon tetra in good conditions.
What water parameters does Lemon tetra need?
A temperature of 23–28 °C, pH 5.5–7.5.
Is Lemon tetra peaceful or aggressive?
Its temperament is peaceful.
What does Lemon tetra eat?
Its diet: omnivore.
How many Lemon tetra should be kept together?
It is a social species: keep a group of at least 8.
How big does Lemon tetra get?
Around 5 cm as an adult.
Is Lemon tetra suitable for beginners?
Care level: beginner.
Planning a tank with Lemon tetra?
AquaTender turns these parameters into live advice: it checks whether your tank is big enough, how heavily it's stocked, and whether your fish are compatible — then tracks water tests, photos and maintenance for you.
Fish from the same biotope
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