Neon tetra
Upper Amazon basin: Peru, Colombia, Brazil
- Temperament
- Peaceful
- Diet
- Omnivore
- pH
- 5–7
- Group
- 6+
- Typical price
- $2–5
Demo
Planted neon tank
River Keep demo · Small, about 20 gal · calm, like a pond or swamp · running 998 days · shared October 2026
A classic 20-gallon planted tank. Cool-tolerant fish, gentle filter, and shrimp cleaning up.
The fish
× 12
A dozen is the minimum; they look far better in a bigger school.
Panda corydoras
Clear Andean foothill streams, Peru
- Temperament
- Peaceful
- Diet
- Omnivore
- pH
- 6–7.5
- Group
- 6+
- Typical price
- $5–9
× 6
Otocinclus
Streams across South America
- Temperament
- Peaceful
- Diet
- Grazer
- pH
- 6–7.5
- Group
- 6+
- Typical price
- $4–7
× 6
Fed algae wafers until the tank grew enough biofilm.
Cherry shrimp
Streams of Taiwan and eastern China
- Temperament
- Peaceful
- Diet
- Grazer
- pH
- 6.5–8
- Group
- 10+
- Typical price
- $2–5
× 10
The colony has tripled.
Report
- Shared range 21–25°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.
- Near the limit (96%)
Workable with strong filtration and weekly large water changes, but leave room for fry that grow up in the tank.
- 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 Cherry shrimp, Neon tetra, Otocinclus, Panda corydoras is estimated or taken from the genus, not yet checked against a source.