The maintenance of Oscar fish mainly includes matters needing attention in aspects such as the selection of the aquarium, water quality management, feed and feeding, as well as lighting and oxygen supply.

Selection and Decoration of the Aquarium
Size Selection: Oscar fish (Arapaima) are relatively large in size. The length of the aquarium should be at least twice the length of an adult fish, and the width should be no less than 60 centimeters to ensure that they have enough space to move around.
Environmental Decoration: The bottom of the aquarium can be covered with fine sand. Add a few aquatic plants and caves as decorations to simulate their natural habitat, providing hiding places and activity space.
Water Quality Management
Water Temperature Control: The ideal water temperature should be maintained between 22°C and 30°C. Use a heater and a thermometer to precisely control the temperature.
Water Quality Management: Regularly replace a part of the water in the aquarium, and use a filter to keep the water clear and reduce the accumulation of harmful substances. Maintaining the stability of water quality parameters is the key to the health of Oscar fish.
Feed and Feeding
Feed Selection: Oscar fish are carnivorous fish and prefer foods such as small fish, insects, and animal internal organs.
Feeding Method: Feed in an appropriate amount to avoid overfeeding, which may lead to obesity and indigestion. Arrange the feeding ration reasonably according to the size and appetite of the fish to ensure a balanced diet.
Lighting and Oxygen Supply
Lighting: Appropriate lighting can promote the metabolism of Oscar fish and make their colors more vivid.
Oxygen Supply: Oscar fish have accessory respiratory organs and can surface to breathe when the oxygen in the water is insufficient. Therefore, it is necessary to ensure an adequate supply of oxygen in the fish tank.