10 Gallon Standard
The classic beginner aquarium. Offers just enough volume and stability for small rasboras, nano tetras, or a centerpiece Betta.
Similar Tanks & Sizes
The classic beginner aquarium. Offers just enough volume and stability for small rasboras, nano tetras, or a centerpiece Betta. With a capacity of 38 litres (10 gallons) and dimensions of 51 x 25 x 30, this standard tank is compatible with 52 species in our database — giving you plenty of options for a thriving community setup.
Tank equipment picks
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Stocking Tips
- 💡Choose one centrepiece fish and build your community around it. Avoid multiple territorial species in a tank this size.
- 💡A good filtration system rated for 1.5× your tank volume helps maintain stable water quality.
Stocking Recipes
Pre-built species combinations that work well together in this tank.
Peaceful Community
- Gardner's Killifish×1Centerpiece
- Chili Rasbora×6Schooling
- Bee Shrimp×5Bottom Dweller
Bold & Beautiful
- Mosquitofish (Gambusia)×1Centerpiece
- Blue Back Blue Eye×6Schooling
- Rachov's Killifish (Annual)×1Bottom Dweller
Nano-Friendly Mix
- Chili Rasbora×6Schooling
- Bladder Snail (Pest Snail)×1Bottom Dweller
Gentle Giants
- Betta (Siamese Fighting Fish)×1Centerpiece
- Japanese Ricefish (Medaka)×6Schooling
- Rachov's Killifish (Annual)×1Bottom Dweller
Low Maintenance Setup
- Chili Rasbora×6Schooling
- Bee Shrimp (Crystal Red / Black)×10Bottom Dweller
Schooling Showcase
- Chili Rasbora×6Schooling
- Blue Pearl Shrimp×6Bottom Dweller
Water and maintenance products
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Commonly Mis-Stocked
These fish are frequently added to this tank but may outgrow it or cause problems. Proceed with caution.
Adolfo Cory requires at least 60cm of swimming length, which is 18% longer than this tank's 51cm.
African Butterfly Cichlid requires at least 60cm of swimming length, which is 18% longer than this tank's 51cm.
African Clawed Frog requires at least 60cm of swimming length, which is 18% longer than this tank's 51cm.
African Pipefish requires at least 60cm of swimming length, which is 18% longer than this tank's 51cm.
Agassiz Cory requires at least 60cm of swimming length, which is 18% longer than this tank's 51cm.
Agassiz's Dwarf Cichlid requires at least 60cm of swimming length, which is 18% longer than this tank's 51cm.
Amazon Leaf Fish requires at least 60cm of swimming length, which is 18% longer than this tank's 51cm.
American Grass Shrimp fits this tank now but grows rapidly — monitor closely and be prepared to upgrade.
Apistogramma Black-Chin requires at least 60cm of swimming length, which is 18% longer than this tank's 51cm.
Apistogramma Broad-banded requires at least 60cm of swimming length, which is 18% longer than this tank's 51cm.
Apistogramma Mamoré requires at least 60cm of swimming length, which is 18% longer than this tank's 51cm.
Apistogramma Marmor (Marbled Apisto) requires at least 60cm of swimming length, which is 18% longer than this tank's 51cm.
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Centerpiece Fish
Bold, eye-catching species that serve as the focal point of your tank. Typically kept singly or in pairs.
Betta (Siamese Fighting Fish)
Betta splendens
The Siamese Fighting Fish is an aquarium icon known for its labyrinth organ (allowing air breathing) and vivid colors. While hardy, they require heated, filtered water (24-30°C). Males are solitary and fiercely territorial. Females are generally less ornate but can be kept in 'sororities' with strict precautions (minimum 5 females in 75L+).
Betta Smaragdina
Betta smaragdina
A beautiful wild-type Betta species native to the Khorat Plateau of Thailand, known for its striking iridescent emerald-green scales. Unlike the domestic Betta splendens, they are slightly more peaceful and closely resemble their natural wild form. They are excellent jumpers and require tight-fitting lids.
Bumblebee Goby (Brackish)
Brachygobius xanthozonus
A miniature, bottom-dwelling goby famous for its striking black and yellow stripes. While they are often sold as freshwater fish and can survive in it temporarily, they are highly susceptible to fungal infections in fresh water and truly require a brackish setup (SG 1.002-1.005) to thrive long-term. They are notoriously picky eaters, often ignoring flakes in favor of live or frozen foods (like bloodworms or brine shrimp).
Gardner's Killifish
Fundulopanchax gardneri
A stunning, semi-annual killifish native to Nigeria and Cameroon. Known for being relatively hardy and an excellent 'beginner' killifish. They are notorious jumpers and require a tightly fitting lid. While they can be kept in community tanks with similarly sized, fast-moving fish, males can be boisterous and territorial.
Mexican Dwarf Crayfish (CPO)
Cambarellus patzcuarensis
A highly entertaining, fully aquatic dwarf crayfish. In the aquarium trade, the bright orange 'CPO' morph is the most popular. Unlike larger crayfish, they are generally safe with plants and fast-moving mid-to-top dwelling fish. However, they are opportunistic omnivores with claws; they will hunt dwarf shrimp and may nip the fins of slow, long-finned bottom dwellers.
Mosquitofish (Gambusia)
Gambusia affinis
An extremely hardy livebearer historically introduced worldwide for mosquito control. In the aquarium, they are notorious fin-nippers and highly aggressive towards other small fish. They are best kept in species-only setups or indoor/outdoor ponds. Males are significantly smaller than females.
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Schooling Fish
Active swimmers best kept in groups. They bring movement and colour to the mid and upper levels of your tank.
Blue Back Blue Eye
Pseudomugil cyanodorsalis
A tiny, highly active euryhaline species native to the mangrove swamps and tidal estuaries of Northern Australia. While biologically capable of surviving in pure freshwater or full marine conditions, they require a brackish aquarium (SG 1.005-1.015) to thrive, breed, and resist disease long-term. They are peaceful shoaling fish but spectacular jumpers, so a tight-fitting lid is absolutely mandatory.
Chili Rasbora
Boraras brigittae
A striking, deeply red nano fish native to the blackwater streams and peat swamps of southern Borneo. They are extremely peaceful and require a mature, densely planted aquarium with soft, acidic water. Due to their tiny size, they are completely safe with adult dwarf shrimp and are ideal for nano setups.
Clown Killifish
Epiplatys annulatus
A striking nano killifish resembling a tiny rocket. Native to West African swamps, they have distinct black and yellow vertical bands. They are strictly surface dwellers (top-level) and are non-annual, meaning they live longer than annual killifish (2-3+ years). They are notorious jumpers and require a tight lid.
Copper Harlequin Rasbora
Trigonostigma hengeli
A small, peaceful, and highly active schooling fish known for the striking glowing orange or copper stroke above its thin black 'pork-chop' marking. Smaller and much more slender than the standard Harlequin Rasbora, they are perfect for planted nano aquariums. They must be kept in schools of at least 6 to feel secure and display their best colors.
Dwarf Rasbora
Boraras maculatus
A tiny, peaceful shoaling fish native to the blackwater streams and peat swamps of Southeast Asia. Known for their striking red/orange coloration and distinct dark body spots. They are an excellent choice for heavily planted nano tanks and peaceful dwarf shrimp setups. Because of their minute size, they are easily outcompeted for food and predated upon by larger fish.
Ember Tetra
Hyphessobrycon amandae
The Ember Tetra is a striking, fiery orange-red nano fish native to the Araguaia River basin in Brazil. Extremely peaceful and active, they are perfect for planted and blackwater aquariums. They are tight schoolers and must be kept in groups to feel secure and display their best colors.
Bottom Dwellers
Species that inhabit the lower reaches of the aquarium, helping keep the substrate clean and adding activity to the tank floor.
African Dwarf Frog
Hymenochirus boettgeri
A fully aquatic amphibian that is peaceful and highly entertaining. They possess lungs and must regularly dart to the surface to breathe air, so tank height should ideally be under 40cm (15 inches). Due to their poor eyesight, they hunt by smell and tactile vibration, making them slow feeders that can easily starve if housed with fast, aggressive fish. They are social creatures that thrive in small groups.
Amano Shrimp
Caridina multidentata
A highly popular, industrious freshwater shrimp renowned for its unmatched algae-eating abilities. Popularized by aquascaper Takashi Amano, they are significantly larger and hardier than most dwarf shrimp (like Cherry Shrimp). They are notorious food-thieves during feeding time and excellent escape artists, requiring a tight-fitting lid. Their larvae require saltwater to develop, so they will not overpopulate in a freshwater aquarium.
American Grass Shrimp
Palaemonetes kadiakensis
A completely freshwater shrimp native to North America. Often sold interchangeably with Ghost Shrimp (P. paludosus), the American Grass Shrimp is hardier, breeds more easily in entirely freshwater, and is an excellent, active scavenger for community tanks. They have a completely transparent body and prefer planted aquariums.
Assassin Snail
Anentome helena
A highly effective and popular carnivorous freshwater snail used primarily for pest snail control. They actively hunt and consume smaller snails like bladder, ramshorn, and pond snails. Featuring a striking yellow and dark brown spiraled shell, they are a functional and attractive addition to aquariums. Unlike many aquatic snails, they are not hermaphroditic and reproduce quite slowly.
Bee Shrimp
Caridina logemanni
A highly prized dwarf freshwater shrimp known for its striking opaque color bands. Native to streams in Southern China, they require specific parameters to thrive: cool, highly oxygenated, acidic, and very soft water. This is usually achieved using RO (Reverse Osmosis) water remineralized with specific shrimp salts and active buffering soil. They are highly sensitive to nitrogen spikes and copper, and are extremely vulnerable to fish predation.
Bee Shrimp (Crystal Red / Black)
Caridina cantonensis
A sensitive, highly prized dwarf shrimp species known for its vivid red/white or black/white banding. Unlike the hardy Cherry Shrimp (Neocaridina), Bee Shrimp require cool, soft, acidic water and typically require active buffering soil to thrive. They are peaceful grazers perfect for specific biotope setups.
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Other Compatible Species
Additional species that are compatible with this tank size but don't fall neatly into the categories above.
Betta Imbellis
Betta imbellis
Known as the 'Peaceful Betta', Betta imbellis is a wild species closely related to Betta splendens. Unlike their highly aggressive domestic cousins, they can often be kept in pairs or carefully managed groups. They are native to blackwater swamps and require calm, tannin-stained water with plenty of cover. They are exceptionally prone to jumping.
Endler's Livebearer
Poecilia wingei
A tiny, vibrant, and highly active livebearer closely related to the Guppy. Males display intense, neon colors and patterns, while females are larger and plainly colored. They are prolific breeders and require hard, alkaline water to thrive.
Guppy
Poecilia reticulata
One of the most iconic and widely kept aquarium fish. Renowned for their incredible colors, hardiness, and prolific breeding. As livebearers, they give birth to fully formed, free-swimming fry. Males constantly pursue females for mating; therefore, a ratio of at least 2 females per male is strongly recommended to disperse stress.
Honey Gourami
Trichogaster chuna
The smallest and most peaceful member of the Trichogaster genus. Ideally suited for planted nano aquariums. Unlike the aggressive Dwarf Gourami (*T. lalius*), Honey Gouramis are timid and gentle. True Honey Gouramis rarely exceed 5cm. Note: Many bright red fish sold as 'Red Honey' or 'Red Robin' are actually Thick-lipped Gouramis (*T. labiosa*), which grow larger.
Platy
Xiphophorus maculatus
A quintessential community fish known for its durability and massive variety of colors. Native to Central America, Platies are livebearers, meaning they give birth to free-swimming fry. They are peaceful, active grazers that require hard, alkaline water to thrive. They are excellent for beginners but breed prolifically.
Frequently Asked Questions — 10 Gallon Standard
How many fish can I put in a 10 Gallon Standard?
The 10 Gallon Standard (38 L / 10 gal) is compatible with 52 species in our database. The actual number of individual fish depends on the species mix — use the stocking recipes above as a starting point and aim to keep the total bioload below 85% of capacity.
What is the best centrepiece fish for a 10 Gallon Standard?
Popular centrepiece options for this tank include Betta (Siamese Fighting Fish), Betta Smaragdina, Bumblebee Goby (Brackish). A centrepiece fish should be the focal point of your aquarium — choose one with colours and behaviour that complement your other species.
What schooling fish work in a 10 Gallon Standard?
Great schooling options include Blue Back Blue Eye, Chili Rasbora, Clown Killifish. Schooling fish should be kept in groups of at least 6 to encourage natural behaviour and reduce stress.
What bottom dwellers suit a 10 Gallon Standard?
Suitable bottom dwellers include African Dwarf Frog, Amano Shrimp, American Grass Shrimp. These species occupy the lower zone of your tank, helping to keep the substrate tidy and adding activity to an often-overlooked area.
What temperature should a 10 Gallon Standard be?
The ideal temperature depends on the species you keep. Most tropical freshwater fish thrive between 24–27°C (75–80°F). Check each species' requirements and aim for the overlapping range that suits all your inhabitants.