Asia
Asian Stone Catfish
Hara jerdoni
Temp18–24°C
pH5.6–7.6
Size3 cm
DietOmnivore
Swim—
DifficultyModerate
Asian Stone Catfish
Hara jerdoni
Starting Small? Find the perfect fish for your nano tank.
Showing fish with recommended minimum tank size up to 10 gallon.
Nano-safe
Nano-safe
Asia
Malabar pufferfish
Carinotetraodon travancoricus
Temp22–28°C
pH6.8–8
Size2.5 cm
DietCarnivore
Swim—
DifficultyExpert
Malabar pufferfish
Carinotetraodon travancoricus
Nano-safe
Taiwan (selectively bred)
Yellow Shrimp
Neocaridina davidi var. yellow
Temp18–28°C
pH6.5–8
Size3 cm
DietOmnivore
Swim—
DifficultyEasy
Yellow Shrimp
Neocaridina davidi var. yellow
Nano-safe
Taiwan (selectively bred)
Blue Velvet Shrimp
Neocaridina davidi var. blue
Temp18–28°C
pH6.5–8
Size3 cm
DietOmnivore
Swim—
DifficultyModerate
Blue Velvet Shrimp
Neocaridina davidi var. blue
Nano-safe
Taiwan (selectively bred)
Rili Shrimp
Neocaridina davidi var. rili
Temp18–28°C
pH6.5–8
Size3 cm
DietOmnivore
Swim—
DifficultyEasy
Rili Shrimp
Neocaridina davidi var. rili
Nano-safe
Asia
Galaxy betta
Betta splendens var.
Temp24–30°C
pH6–8
Size6.5 cm
DietCarnivore
Swim—
DifficultyModerate
Galaxy betta
Betta splendens var.
Nano-safe
Taiwan (selectively bred from wild Neocaridina davidi)
Cherry Shrimp
Neocaridina davidi
Temp18–28°C
pH6.5–8
Size3 cm
DietOmnivore
Swim—
DifficultyEasy
Cherry Shrimp
Neocaridina davidi
Nano-safe
Asia
Least rasbora
Boraras urophthalmoides
Temp24–28°C
pH6–7
Size2 cm
DietOmnivore
Swim—
DifficultyEasy
Least rasbora
Boraras urophthalmoides
Nano-safe
Southeast Asia (Indonesia, Thailand, Malaysia)
Assassin Snail
Anentome helena
Temp20–28°C
pH7.2–8.5
Size3 cm
DietCarnivore
Swim—
DifficultyEasy
Assassin Snail
Anentome helena
Nano-safe
East Africa (Kenya, Tanzania, Mozambique)
Zebra Nerite
Vittina natalensis
Temp22–28°C
pH7–8.5
Size3 cm
DietHerbivore
Swim—
DifficultyModerate
Zebra Nerite
Vittina natalensis
Nano-safe
Southeast Asia (Indonesia, Philippines)
Onion Snail
Vittina olivacea
Temp22–28°C
pH7–8.5
Size3 cm
DietHerbivore
Swim—
DifficultyModerate
Onion Snail
Vittina olivacea
Nano-safe
Asia
Alien betta
Betta splendens hybrid
Temp24–30°C
pH6–7.5
Size6.5 cm
DietCarnivore
Swim—
DifficultyEasy
Alien betta
Betta splendens hybrid
Nano-safe
Asia
Black Towuti goby
Mugilogobius hitam
Temp24–28°C
pH7–8
Size4.3 cm
DietInsectivore
Swim—
DifficultyExpert
Black Towuti goby
Mugilogobius hitam
Nano-safe
Asia
Emerald Dwarf Rasbora
Danio erythromicron
Temp20–24°C
pH7–8
Size2 cm
DietOmnivore
Swim—
DifficultyEasy
Emerald Dwarf Rasbora
Danio erythromicron
Nano-safe
Asia
Neon Blue Rasbora
Sundadanio axelrodi
Temp23–26°C
pH4–6.5
Size2.5 cm
DietOmnivore
Swim—
DifficultyHard
Neon Blue Rasbora
Sundadanio axelrodi
Nano-safe
Asia
White cloud mountain minnow
Tanichthys albonubes
Temp14–22°C
pH6–8
Size4 cm
DietOmnivore
Swim—
DifficultyEasy
White cloud mountain minnow
Tanichthys albonubes
Nano-safe
Asia
Microdevario
Microdevario microphthalma
Temp20–26°C
pH6.8–7.5
Size2.6 cm
DietInsectivore
Swim—
DifficultyEasy
Microdevario
Microdevario microphthalma
Best Fish for Nano Tanks
Small aquariums are less forgiving, so prioritize peaceful species with low bioload and stable group behavior.
Match fish to realistic tank volume after substrate and hardscape displacement, not label volume alone.
Keep stocking conservative and maintain consistent water-change routines for long-term stability.