The short answer
It depends — possible, but only in the right tank. A betta and a school of neon tetras can coexist in a larger, planted aquarium, and it’s one of the more successful betta community setups. But it needs space, a proper school of tetras, and a betta with a calm temperament. In a small tank, or with a feisty betta, it can go wrong fast.
Why it can work
Neon tetras occupy the middle of the tank and stick together in a shoal, while a betta tends to patrol the top and rest among plants. Their colours are small and their fins short, so a betta is less likely to mistake them for a rival than it would a flashy guppy. A confident school also ignores the betta rather than harassing it.
How to do it safely
- Use a 54 litre (15 gallon) tank or larger, heavily planted with hiding spots.
- Keep neons in a group of six or more so they feel secure and stay off the betta.
- Add the tetras first, let them settle, then introduce the betta.
- Pick a betta with a placid personality if you can, and keep a backup plan ready.
- Watch temperatures: both like around 25–26°C, so they’re a good climate match.
Alternatives worth considering
If your tank is smaller, skip the tetras. A betta does beautifully alone with a nerite snail or cherry shrimp for cleanup, or with peaceful bronze corydoras on the bottom. See can a betta live with corydoras?, our best betta tank guide, and the care sheets for the betta fish and neon tetra. For stocking limits, read how many fish you can keep.