AquariumStocking ideas · checked against sources
What fish can go in a 10 gallon tank?
A standard 10 gallon tank is 20 × 10 × 12 inches. Of the 106 species in our database, 13 fit comfortably and 12 are a tight fit, based on each species' sourced minimum tank size and group size.
Stocking combinations that pass every check
Each set was run through the tank builder's rules: tank size, temperature, pH, hardness, predation, fin-nipping, temperament and stocking level. Treat them as starting points, not prescriptions.
Stocking about 25% · shared temperature 70–80°F
Open in tank builderFish that fit a 10 gallon tank
Tetras & rasboras (1)
Shrimp & snails (10)
- Cherry Shrimp1.6 in adult · group 10+
- Amano Shrimp2 in adult · group 6+
- Nerite Snail1 in adult
- Mystery Snail2 in adult
- Assassin Snail1.3 in adult
- Crystal Red Shrimp1.5 in adult
- Ghost Shrimp2 in adult · group 6+
- Japanese Trapdoor Snail2.6 in adult
- Malaysian Trumpet Snail3.1 in adult
- Ramshorn Snail1.2 in adult
Others (2)
Tight fit (just under a sourced minimum)
- BettaNeeds care3.3 in adult
- Bumblebee GobyNeeds care1.7 in adult · group 6+
- Celestial Pearl Danio1 in adult · group 20+
- Clown Killifish1.6 in adult · group 8+
- Ember Tetra0.9 in adult · group 8+
- Endler's LivebearerNeeds care1.2 in adult · group 6+
- Guppy2.8 in adult · group 6+
- Julii Cory2.6 in adult · group 6+
- OtocinclusNeeds care1.7 in adult · group 6+
- Panda Cory2.4 in adult · group 6+
- Pygmy Cory1.4 in adult · group 6+
- Sparkling Gourami1.9 in adult · group 2+
Popular fish that outgrow it
- Neon TetraNeeds 24 in long / 14 gal
- Cardinal TetraNeeds 24 in long / 14 gal
- Harlequin RasboraNeeds 24 in long / 14 gal
- Cherry BarbNeeds 24 in long / 14 gal
- Rummy-nose TetraNeeds 35 in long
- Black Neon TetraNeeds 31 in long / 19 gal
- Glowlight TetraNeeds 24 in long / 18 gal
- Lemon TetraNeeds 31 in long / 20 gal
- PlatyNeeds 24 in long / 14 gal
- Honey GouramiNeeds 24 in long / 14 gal
- Dwarf GouramiNeeds careNeeds 24 in long / 15 gal
- Pearl GouramiNeeds 36 in long / 21 gal
Gear sized for 10 gallon
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Common questions
How many fish can go in a 10 gallon tank?
It depends on adult size and waste output, not inches per gallon. The combinations on this page stay under about 80% of a sensible load for 10 gallons in our estimate.
What fish outgrow a 10 gallon tank?
Popular examples include Neon Tetra, Cardinal Tetra, Harlequin Rasbora, Cherry Barb, Rummy-nose Tetra, Black Neon Tetra.
What heater size does a 10 gallon tank need?
About 50 W, using roughly 5 watts per gallon.