To ensure that betta fish can live in a healthy and comfortable environment, multiple aspects need to be considered when purchasing and arranging a betta fish aquarium. Here are some key steps and suggestions:

Choose the right fish tank:
It is recommended to use a Jinjing ultra-clear square tank as it is both beautiful and practical.
The size of the fish tank should be moderate. Generally, a length of 20 to 30 centimeters is sufficient to accommodate a betta fish. Avoid using an overly large fish tank because betta fish are active in nature, and too large a space may not be conducive to their activities.
The material of the fish tank can be acrylic, glass, or food-grade plastic. Ensure that each fish has at least 10 liters of water.
Configure necessary equipment:
Install a silent filter to keep the water clean. The Sensen Xiaoli filter is recommended as it has moderate power and will not disturb the betta fish's rest.
Use a heating rod to maintain an appropriate water temperature. The suitable water temperature range for betta fish is 24 to 28 degrees Celsius. The heating rod should be placed on the side of the fish tank to avoid affecting the betta fish's activities.
Consider equipping with oxygenation equipment to ensure sufficient oxygen supply in the water.
Arrange fish tank decorations:
Arrange some decorations such as aquatic plants, stones, or rockeries in the fish tank to provide a comfortable living environment for betta fish.
Ensure that the decorations will not scratch the betta fish. Avoid using sharp objects.
Pay attention to water quality management:
Betta fish have relatively high requirements for water quality. Clean and unpolluted water needs to be used and replaced regularly. It is recommended to adjust the water quality to a pH value between 6.5 and 7.2. Replace the water every five days or so, and the amount replaced each time should not exceed one-third of the total water volume.
Establish a good filtration system and replace the filtration materials regularly to ensure clean water quality.
Control temperature and lighting:
Betta fish like to grow in a warm environment. The optimal temperature is maintained between 25 and 28 degrees. Use a heating rod to maintain the temperature. If necessary, the temperature can be adjusted by turning on a fan or air conditioner.
Betta fish need to receive an appropriate amount of lighting every day. A special light for fish tanks can be placed next to the fish tank and turned on for 2 to 4 hours every day to promote the growth and development of betta fish and maintain their beautiful colors.
Through the above steps, an ideal living environment can be provided for betta fish, while ensuring their health and happiness.