Betta (Siamese fighting fish) care
Betta splendens
Betta (Siamese fighting fish) (Betta splendens) grows to about 7 cm (2.8 in) and needs a tank of at least 20 liters (5 US gallons). Keep it at 24–29 °C (75–84 °F) with a pH of 6–7.5.
FreshwaterEasySemi-aggressiveKeep one: males fightLong, delicate fins
Adult size7 cm · 2.8 in
Smallest tank20 L · 5 gal
Temperature24–29 °C · 75–84 °F
pH6–7.5
GroupAlone or a pair
TemperamentSemi-aggressive
SwimsTop
DietCarnivore
Usually fine with
GuppyPlatyCardinal tetraBronze corydorasZebra danioHarlequin rasboraAngelfishMollyBristlenose plecoCherry barbDwarf gouramiSwordtail
Avoid with
Tiger barbBlack skirt tetraSerpae tetraBuenos Aires tetraParadise fishWhite cloud minnowConvict cichlidOscarJack DempseyDemasoni cichlidCommon goldfishKoi
Track your tank with Guppi
Log water tests by tapping your kit’s colors, get water change reminders and check every tankmate before you buy.
Typical ranges from hobby references, checked by hand. Individual fish and local water vary.
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