Species profile
Splash Tetra
Copella arnoldiSplash Tetra (Copella arnoldi) is a schooling community species for a cycled 20+ gallon freshwater aquarium. Plan for about 2.5 inches as an adult, 74-82°F water, pH 5.5-7.2, and beginner-friendly care. Keep a group of at least 6; larger groups often behave more naturally when the tank has room.
Community leaningBeginner-friendly care
20 galMinimum tank
2.5 inAdult size
6Schooling minimum
74-82°FTemperature
Water Range
- pH
- 5.5-7.2
- GH
- 1-10 dGH
- KH
- 1-6 dKH
Behavior
- Temperament
- Peaceful
- Fin nipping
- 0/5
- Territory
- 0/5
Diet and Care
- Diet
- omnivore/micro-predator
- Diet difficulty
- 2/5
- Care difficulty
- 2/5
Planning Notes
Sensitive species; best for stable, mature tanks with consistent water quality.
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Run Splash Tetra through the checker with your tank size, cycle status, water, group count, and tankmates before buying.
Check my tankCompare this speciesPut Splash Tetra beside another profile to compare water range, size, diet, schooling needs, and behavior.
Open comparisonWill plants work?Match Splash Tetra against aquarium plants for nibbling, uprooting, cover, flow, and water-range flags.
Open plant matchAsk about my setupAsk Advisor how Splash Tetra fits with your current tank, recent logs, plants, and livestock.
Ask AdvisorView native rangeOpen the origins map to see reviewed native-range coordinates and regional context for Splash Tetra.
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