Cardinal tetra
Peaceful · Middle · moderate care
- 1.2 in adult
- 20+ gal
- 73–81 °F
- pH 5 to 7
- groups of 8+
Fish for soft water
Species from soft, acidic rivers that do best at low pH and hardness, often with tannins from wood and leaves.
Kuhli loach
Peaceful · Bottom · easy care
- 4 in adult
- 20+ gal
- 75–82 °F
- pH 5.5 to 7
- groups of 5+
Chili rasbora
Peaceful · Middle · moderate care
- 0.8 in adult
- 5+ gal
- 72–82 °F
- pH 5 to 7
- groups of 8+
Rummy-nose tetra
Peaceful · Middle · moderate care
- 2 in adult
- 20+ gal
- 75–82 °F
- pH 5.5 to 7
- groups of 8+
Black neon tetra
Peaceful · Middle · easy care
- 1.5 in adult
- 10+ gal
- 73–81 °F
- pH 5.5 to 7.5
- groups of 6+
German blue ram
Peaceful · Bottom · demanding care
- 3 in adult
- 20+ gal
- 78–85 °F
- pH 5 to 7
- alone or pair
Cockatoo dwarf cichlid
Semi-aggressive · Bottom · moderate care
- 3 in adult
- 20+ gal
- 75–84 °F
- pH 5.5 to 7.5
- alone or pair
Agassiz's dwarf cichlid
Semi-aggressive · Bottom · moderate care
- 1.7 in adult
- 20+ gal
- 75–84 °F
- pH 5 to 7
- alone or pair
Bleeding heart tetra
Peaceful · Middle · easy care
- 2.4 in adult
- 20+ gal
- 72–80 °F
- pH 5.5 to 7.5
- groups of 6+
Brilliant rasbora
Peaceful · Middle · easy care
- 2 in adult
- 20+ gal
- 72–79 °F
- pH 5.5 to 7
- groups of 8+
Checker barb
Peaceful · Middle · easy care
- 2 in adult
- 20+ gal
- 64–77 °F
- pH 5.5 to 7.5
- groups of 6+
Chocolate gourami
Peaceful · Middle · demanding care
- 2.4 in adult
- 20+ gal
- 77–81 °F
- pH 5 to 6.5
- alone or pair
Clown killifish
Peaceful · Top · moderate care
- 1.4 in adult
- 5+ gal
- 72–80 °F
- pH 5.5 to 7
- groups of 4+
Coral red pencilfish
Peaceful · Middle · moderate care
- 1.1 in adult
- 10+ gal
- 75–82 °F
- pH 5 to 7
- groups of 8+
Discus
Peaceful · Middle · demanding care
- 8 in adult
- 55+ gal
- 82–88 °F
- pH 5 to 7
- groups of 5+
Dwarf pencilfish
Peaceful · Middle · moderate care
- 1.4 in adult
- 10+ gal
- 75–82 °F
- pH 5.5 to 7.5
- groups of 6+
Dwarf rasbora
Peaceful · Middle · moderate care
- 1 in adult
- 5+ gal
- 75–82 °F
- pH 5 to 7
- groups of 8+
Exclamation point rasbora
Peaceful · Middle · moderate care
- 0.6 in adult
- 5+ gal
- 72–82 °F
- pH 5.5 to 7
- groups of 8+
Five-banded barb
Peaceful · Middle · moderate care
- 3.5 in adult
- 29+ gal
- 74–84 °F
- pH 5 to 7
- groups of 5+
Golden pencilfish
Peaceful · Top · moderate care
- 2.6 in adult
- 15+ gal
- 75–82 °F
- pH 5.5 to 7.5
- groups of 6+
Green neon tetra
Peaceful · Middle · moderate care
- 1 in adult
- 10+ gal
- 75–82 °F
- pH 5 to 6.5
- groups of 8+
Lyretail killifish
Peaceful · Top · moderate care
- 2.4 in adult
- 10+ gal
- 70–79 °F
- pH 5.5 to 7
- groups of 3+
Marbled hatchetfish
Peaceful · Top · moderate care
- 1.5 in adult
- 20+ gal
- 75–82 °F
- pH 5.5 to 7
- groups of 6+
Phoenix rasbora
Peaceful · Middle · moderate care
- 0.8 in adult
- 5+ gal
- 74–82 °F
- pH 5 to 7
- groups of 8+
Red phantom tetra
Peaceful · Middle · moderate care
- 1.3 in adult
- 15+ gal
- 68–77 °F
- pH 5.5 to 7.5
- groups of 6+
Ruby tetra
Peaceful · Middle · moderate care
- 1 in adult
- 10+ gal
- 72–80 °F
- pH 5 to 7
- groups of 8+
Serpae tetra
Semi-aggressive · Middle · easy care
- 1.6 in adult
- 20+ gal
- 72–79 °F
- pH 5.5 to 7.5
- groups of 6+
Spotted blue-eye
Peaceful · Top · moderate care
- 1 in adult
- 10+ gal
- 75–82 °F
- pH 5.5 to 7.5
- groups of 6+
Uaru
Semi-aggressive · Middle · moderate care
- 9.8 in adult
- 75+ gal
- 79–86 °F
- pH 5.5 to 7
- groups of 2+
No species on this list match those filters. Try a larger tank or clear a filter.
More fish lists
Fish for a 5 gallon tankFish for a 10 gallon tankFish for a 15 gallon tankFish for a 20 gallon tankFish for a 29 gallon tankFish for a 30 gallon tankFish for a 40 gallon tankFish for a 50 gallon tankFish for a 55 gallon tankFish for a 75 gallon tankFish for a 100 gallon tankFish for a 125 gallon tankBest fish for beginnersBetta tank matesGoldfish tank matesAngelfish tank matesShrimp-safe fishCold-water fishSchooling fishBottom-dwelling fishTop-dwelling fishAlgae eatersNano fishCenterpiece fishFish for hard waterDither fishColorful freshwater fishAll fish
Names, and adult sizes where the article gives one, are checked against Wikipedia; care ranges are common hobby guidance, and each species page says which is which. 29 of these 29 are fish. Photos are real photographs from Wikimedia Commons, credited below; the lineup is our own drawing at one scale.
Photo credits
Real photographs from Wikimedia Commons, resized and cropped to fit; each is used under the license named.
- Cardinal tetra CHUCAO, CC BY-SA 3.0, via Wikimedia Commons
- Kuhli loach Iidkk, CC BY-SA 4.0, via Wikimedia Commons
- Chili rasbora JoKrimmel, CC BY-SA 4.0, via Wikimedia Commons
- Rummy-nose tetra PierangeloGatto, CC BY-SA 4.0, via Wikimedia Commons
- Black neon tetra Debivort, CC BY-SA 3.0, via Wikimedia Commons
- German blue ram Eric Mengel, Public domain, via Wikimedia Commons
- Cockatoo dwarf cichlid William Kreijkes, CC BY-SA 3.0, via Wikimedia Commons
- Agassiz's dwarf cichlid Cisamarc, CC BY-SA 3.0, via Wikimedia Commons
- Bleeding heart tetra 5snake5, CC0, via Wikimedia Commons
- Brilliant rasbora Lerdsuwa, CC BY-SA 3.0, via Wikimedia Commons
- Checker barb Dodoni, CC BY-SA 3.0, via Wikimedia Commons
- Chocolate gourami OSt DD, CC BY-SA 3.0, via Wikimedia Commons
- Clown killifish Dornenwolf, CC BY 2.0, via Wikimedia Commons
- Coral red pencilfish Brian Gratwicke, CC BY 2.0, via Wikimedia Commons
- Discus Patrick Farrelly, Public domain, via Wikimedia Commons
- Dwarf pencilfish Fanch from Paris, France, CC BY 2.0, via Wikimedia Commons
- Dwarf rasbora R.workoran, CC BY-SA 4.0, via Wikimedia Commons
- Exclamation point rasbora R.workoran, CC BY-SA 4.0, via Wikimedia Commons
- Five-banded barb NasserHalaweh, CC BY-SA 4.0, via Wikimedia Commons
- Green neon tetra Sascha Biedermann, CC BY-SA 2.5, via Wikimedia Commons
- Lyretail killifish Alexander Prokoshev, CC BY-SA 3.0, via Wikimedia Commons
- Marbled hatchetfish Sven Kullander, CC BY-SA 4.0, via Wikimedia Commons
- Phoenix rasbora Andrewbogott, CC BY-SA 4.0, via Wikimedia Commons
- Red phantom tetra Tsunamicarlos (English Wikipedia), Public domain, via Wikimedia Commons
- Ruby tetra Thomas Siems, CC BY-SA 2.0, via Wikimedia Commons
- Serpae tetra Faucon, CC BY-SA 2.5, via Wikimedia Commons
- Spotted blue-eye Der Regenbogenfisch, CC BY-SA 3.0 de, via Wikimedia Commons
- Uaru Brent Tibbats, CC BY 3.0, via Wikimedia Commons
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