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76%
fully stocked
UnderLightBalancedFullOver
20 gal·7 species·Water change: 30–40% weekly
Aquarium Type
Tank Dimensions & Volume
≈ 75.7 L
20 gal(75.7 L) · manual
Filtration & Setup
Oversized filtration adds bonus capacity.
Tank Age
Older tanks tolerate higher bioloads.
Stocking
Stock List
Popular species:
7 species
Cardinal Tetra
6
Glowlight Tetra
5
⚠ Glowlight Tetra should be kept in groups of 6 or more.
Celestial Pearl Danio
6
⚠ Celestial Pearl Danio should be kept in groups of 8 or more.
Forktail Rainbowfish
3
⚠ Forktail Rainbowfish should be kept in groups of 6 or more.
Otocinclus
4
⚠ Otocinclus should be kept in groups of 6 or more.
Pygmy Corydoras
4
⚠ Pygmy Corydoras should be kept in groups of 8 or more.
Amano Shrimp
6
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Hey! I'm Finn 🐟 Tell me what you're going for — like "a peaceful 20 gallon community" or "betta paradise tank" — and I'll set everything up for you. You can also ask me to analyze your plan once you've filled it in.
Swim Zones
top
mid
bottom
Empty
Cardinal TetraGlowlight TetraCelestial Pearl DanioForktail Rainbowfish
OtocinclusPygmy CorydorasAmano Shrimp
Compatibility
Compatible temp range:73–79°F (23.0–26.0°C)
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