Oscar care
Astronotus ocellatus
Oscar (Astronotus ocellatus) grows to about 35 cm (13.8 in) and needs a tank of at least 300 liters (79 US gallons). Keep it at 22–27 °C (72–81 °F) with a pH of 6–7.5.
FreshwaterMediumAggressiveEats small fish
Adult size35 cm · 13.8 in
Smallest tank300 L · 79 gal
Temperature22–27 °C · 72–81 °F
pH6–7.5
GroupAlone or a pair
TemperamentAggressive
SwimsMiddle
DietCarnivore
Usually fine with
Avoid with
Neon tetraGuppyBetta (Siamese fighting fish)PlatyCardinal tetraBronze corydorasZebra danioHarlequin rasboraAngelfishMollyBristlenose plecoCherry barb
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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