Betta care guide

Betta tank size

Choose an aquarium with a tank length of at least 40 cm for a single betta. Seriously Fish recommends a longer tank base of 45 cm, which leaves extra room for heating equipment, filtration, and dense plant cover.Choose an aquarium with a tank length of at least 16 in for a single betta. Seriously Fish recommends a longer tank base of 18 in, which leaves extra room for heating equipment, filtration, and dense plant cover.^[1][2]

Always fit a secure lid and leave an open air gap above the water surface. Bettas jump readily and rely on their labyrinth organ to breathe humid air directly from the surface alongside gill respiration.Always fit a secure lid and leave an open air gap above the water surface. Bettas jump readily and rely on their labyrinth organ to breathe humid air directly from the surface alongside gill respiration.^[1][2]

• 5 gal
• 10 gal
• 54 L
• 60 L
• 20 gal high
• 20 gal long
• 29 gal
• 112 L
• 40 gal breeder
• 180 L
• 55 gal
• 75 gal
• 240 L

Betta water parameters

Keep the aquarium temperature steadily at 24–26 °C. Install a reliable thermostatic heater to prevent chilling and verify the setting using a separate thermometer placed inside the tank.Keep the aquarium temperature steadily at 75–79 °F. Install a reliable thermostatic heater to prevent chilling and verify the setting using a separate thermometer placed inside the tank.^[1][2]

Maintain a pH between 6.0 and 8.0 for domestic ornamental strains. Fully cycle your biological filter before introducing the fish, and test the water regularly so ammonia and nitrite remain completely undetectable.Maintain a pH between 6.0 and 8.0 for domestic ornamental strains. Fully cycle your biological filter before introducing the fish, and test the water regularly so ammonia and nitrite remain completely undetectable.^[1][2][4]

Feeding bettas

Feed an adult betta once per day, offering only what it can consume in under two minutes. Use small, high-protein betta pellets or granules as the daily staple food.Feed an adult betta once per day, offering only what it can consume in under two minutes. Use small, high-protein betta pellets or granules as the daily staple food.^[2]

Wild bettas feed on insects and small invertebrates, so captive fish thrive when provided animal-rich meals. Offer thawed brine shrimp or daphnia periodically for variety rather than expecting them to survive on plant material or submerged roots.Wild bettas feed on insects and small invertebrates, so captive fish thrive when provided animal-rich meals. Offer thawed brine shrimp or daphnia periodically for variety rather than expecting them to survive on plant material or submerged roots.^[2][1]

Betta behaviour

House male bettas individually in their own tanks. Never house two males together, and avoid adding a female companion to a male's home, as territorial displays escalate quickly into severe physical damage.House male bettas individually in their own tanks. Never house two males together, and avoid adding a female companion to a male's home, as territorial displays escalate quickly into severe physical damage.^[1][2]

Expect a mature adult length around 4.8 cm, though larger individuals reach an adult length of 5.6 cm. Captive strains come in diverse shapes such as veiltails, crowntails, halfmoons, and short-finned plakats, with an average lifespan of 3–4 years.Expect a mature adult length around 1.9 in, though larger individuals reach an adult length of 2.2 in. Captive strains come in diverse shapes such as veiltails, crowntails, halfmoons, and short-finned plakats, with an average lifespan of 3–4 years.^[1][3][7][2]

Betta tank mates

Peaceful bottom dwellers make reliable tank mates when given adequate space. Peaceful bottom dwellers make reliable tank mates when given adequate space. Bronze corydorasBronze corydoras and and harlequin rasborasharlequin rasboras behave placidly, but both require their own social shoals and a tank significantly larger than a lone betta needs. behave placidly, but both require their own social shoals and a tank significantly larger than a lone betta needs. Kuhli loachesKuhli loaches also stay near the floor if you provide secure hiding spots and target-feed them directly. also stay near the floor if you provide secure hiding spots and target-feed them directly.^[1][2][7][3]

A full shoal of A full shoal of neon tetrasneon tetras can share a larger display, but watch them carefully for fin nipping. Some individual bettas also turn aggressive toward brightly coloured midwater tank mates, making ongoing observation vital. can share a larger display, but watch them carefully for fin nipping. Some individual bettas also turn aggressive toward brightly coloured midwater tank mates, making ongoing observation vital.^[1][2][3]

Avoid boisterous fin nippers such as Avoid boisterous fin nippers such as tiger barbstiger barbs, which shred ornamental fins. Never house a betta with , which shred ornamental fins. Never house a betta with guppiesguppies, because their colourful flowing tails provoke aggressive territorial attacks. Small invertebrates like , because their colourful flowing tails provoke aggressive territorial attacks. Small invertebrates like cherry shrimpcherry shrimp should also be avoided, as bettas actively hunt and eat them. should also be avoided, as bettas actively hunt and eat them.^[1][2][7]

Breeding bettas

A male betta frequently builds a floating bubble nest at the water surface, but this natural instinct does not mean he needs a mate. In breeding setups, the male constructs the nest and protects the fertilised eggs alone after spawning.A male betta frequently builds a floating bubble nest at the water surface, but this natural instinct does not mean he needs a mate. In breeding setups, the male constructs the nest and protects the fertilised eggs alone after spawning.^[1][2]

Betta health problems

Fin rot reveals itself through ragged, deteriorating fins, sometimes displaying red streaks along the affected edges. Bacterial infections usually stem from degraded water parameters or sustained stress. Test your water immediately, correct conditions, and eliminate any aggressive tank mates causing physical damage.Fin rot reveals itself through ragged, deteriorating fins, sometimes displaying red streaks along the affected edges. Bacterial infections usually stem from degraded water parameters or sustained stress. Test your water immediately, correct conditions, and eliminate any aggressive tank mates causing physical damage.^[5]

Ich, or white spot disease, produces distinct white salt-like dots across the body and fins. Diseased fish often breathe heavily or flick against hard surfaces. This condition is caused by an external parasite introduced on new fish, making quarantine and clean aquarium equipment essential.Ich, or white spot disease, produces distinct white salt-like dots across the body and fins. Diseased fish often breathe heavily or flick against hard surfaces. This condition is caused by an external parasite introduced on new fish, making quarantine and clean aquarium equipment essential.^[5][6]

Velvet presents as a fine yellowish or golden dust across the scales, contrasting with the larger solitary dots of white spot. Because velvet is a parasitic condition, quarantine incoming fish to prevent transmission. Avoid diagnosing velvet solely by torchlight, as healthy iridescent scales naturally shine brightly under direct light.Velvet presents as a fine yellowish or golden dust across the scales, contrasting with the larger solitary dots of white spot. Because velvet is a parasitic condition, quarantine incoming fish to prevent transmission. Avoid diagnosing velvet solely by torchlight, as healthy iridescent scales naturally shine brightly under direct light.^[5]

Male or female?

Male bettas generally display richer coloration and dramatically longer finnage than females. However, short-finned male plakat strains look remarkably similar to females. Ask your supplier to verify the sex rather than guessing from tail dimensions alone.Male bettas generally display richer coloration and dramatically longer finnage than females. However, short-finned male plakat strains look remarkably similar to females. Ask your supplier to verify the sex rather than guessing from tail dimensions alone.^[1][3]

Questions