Best Beginner Fish for a Small Tank
Edited by Ivan F.
A small tank leaves little room for error, so these are the easy species that also fit a 10-gallon.
How we pick: Species rated Absolute Beginner or Easy in our care scale whose minimum tank size is within 10% of 10 US gallons or smaller.
Fitting the same tank size does not mean these species can live together. Check each species' tank mates before you buy.

African Dwarf Frog
Hymenochirus boettgeri
- Min tank
- 10 US gal
- Group
- 3+ fish
- pH
- 6.5–7.8
- Swim zone
- Bottom
EasyPeaceful

Betta
Betta splendens
- Min tank
- 11 US gal
- Group
- Single fish
- pH
- 6–8
- Swim zone
- Top
EasyTerritorial/Aggressive

Celestial Pearl Danio
Danio margaritatus
- Min tank
- 11 US gal
- Group
- 6+ fish
- pH
- 6.5–7.5
- Swim zone
- Mid-Water
EasyPeaceful

Ember Tetra
Hyphessobrycon amandae
- Min tank
- 11 US gal
- Group
- 8+ fish
- pH
- 5–7
- Swim zone
- Mid-Water
EasyPeaceful

Endler's Livebearer
Poecilia wingei
- Min tank
- 11 US gal
- Group
- 3+ fish
- pH
- 7–8.5
- Swim zone
- Top
EasyPeaceful

Fancy Guppy
Poecilia reticulata
- Min tank
- 11 US gal
- Group
- 3+ fish
- pH
- 7–8.5
- Swim zone
- Top
EasyPeaceful

Panda Corydoras
Corydoras panda
- Min tank
- 11 US gal
- Group
- 6+ fish
- pH
- 6–7.4
- Swim zone
- Bottom
EasyPeaceful

Sparkling Gourami
Trichopsis pumila
- Min tank
- 11 US gal
- Group
- 2+ fish
- pH
- 5–7.5
- Swim zone
- Top
EasyPeaceful