Tiger barb
Sumatra and Borneo
- Temperament
- Semi-aggressive
- Diet
- Omnivore
- pH
- 6–7.5
- Group
- 6+
- Typical price
- $3–5
Demo
Mixed-up community
River Keep demo · Small, about 20 gal · gentle current, like a stream · running 403 days · shared October 2026
Everything the shop had, in one 20-gallon. Every fish here is fine on its own; together they don't work.
The fish
× 6
Constantly chasing the betta.
Betta (Siamese fighting fish)≈Betta (Siamese fighting fish)
Betta splendens
- Size
- 6.5 cm
- Temp
- 24–30°C
- Flow
- Calm
- From
- Swamp or paddy
Betta (Siamese fighting fish)
Rice paddies and marshes of Thailand
- Temperament
- Semi-aggressive
- Diet
- Carnivore
- pH
- 6–7.5
- Group
- 1+
- Typical price
- $8–40
× 1
Fins torn within a week.
Angelfish
Flooded forests of the Amazon basin
- Temperament
- Semi-aggressive
- Diet
- Omnivore
- pH
- 6–7.5
- Group
- 1+
- Typical price
- $8–30
× 1
Neon tetra
Upper Amazon basin: Peru, Colombia, Brazil
- Temperament
- Peaceful
- Diet
- Omnivore
- pH
- 5–7
- Group
- 6+
- Typical price
- $2–5
× 8
Report
- Shared range 24–26°C
Every species is comfortable in this range.
- No hybrid risk
No two species here can cross, so any fry that turn up are pure.
- Tiger barb will nip Betta (Siamese fighting fish), Angelfish
Fin-nippers go for long, slow fins. Torn fins get infected. Don't keep them together.
- Angelfish will eat Neon tetra
An adult angelfish reaches 15 cm and eats any fish that fits in its mouth, even ones it grew up with.
- Overstocked (156%)
Too much waste for the water. Remove fish, pick a bigger tank, or plan on heavy filtration and large water changes.
- Tank size is a guess
Size and stocking checks use a typical tank of the size you picked. Add the real length and volume for a sharper answer.
- Some values are estimates
Care data for Angelfish, Betta (Siamese fighting fish), Neon tetra, Tiger barb is estimated or taken from the genus, not yet checked against a source.