Lemon Tetra
Characidae sp.
Lemon Tetra (Characidae sp.) — Easy care, Peaceful, under Tetra & Characin. Minimum tank in the app: 17.2 US gal min; aim for 72–82°F and pH 5.5–7.5. Lemon Tetras are ideal for aquarists seeking vibrant, active shoalers that thrive in groups, making them a delightful centerpiece in mid-level swimming zones.

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Mostly South America
- South America
Regional colours match the stocking calculator’s origin map.
Lemon Tetra Tank Setup
Aim for a spacious layout with plenty of plants and driftwood to create hiding spots and visual barriers, promoting a sense of security. Maintain moderate water flow to mimic their natural habitat, and use a dark substrate to enhance their coloration. Bright lighting can be softened with floating plants to create a comfortable ambiance without overwhelming the fish.
What Do Lemon Tetras Eat?
Lemon Tetras are opportunistic feeders, favoring micro foods that can be consumed quickly. A fast feeding pace can lead to competition; thus, scatter food across the tank to ensure all fish have access.
Lemon Tetra Tank Mates
Lemon Tetras harmonize well with similarly sized, peaceful species such as Rasboras and Barbs, as well as other tetras. Avoid larger or more aggressive fish that can intimidate them. Ensure groups remain cohesive; with their shoaling nature, they thrive in numbers, so keep at least six to prevent stress and establish a stable social hierarchy.
Are Lemon Tetras Good for Beginners?
In App-aquatic we file this under easy care. That still means a cycled tank, realistic stocking, and parameters that do not swing every weekend. One common error is underestimating their need for companionship; keeping them in smaller numbers can lead to stress and erratic behavior. neglecting water quality or failing to provide sufficient hiding spaces can result in increased aggression among tank mates or weakened health.
Building a community? Run the full list through the stocking calculator before you add anything else.
Log tests and reminders in App-aquatic—free, same data you see here.




