Determine your own needs and the purpose of the fish filter. Different fish filters are suitable for different aquariums and water quality, and you need to choose the appropriate filter according to your own needs and actual situation.

Understand the filtering principle and filter material of the fish filter. The filtering principle and filter material of a fish filter are key factors that affect the filtering effect. It is necessary to choose the appropriate filtering principle and filter material according to one's own needs and actual situation.

Consider the energy consumption and noise of the fish filter. Some fish filters require the use of a water pump for filtration, which requires consideration of energy consumption and noise to avoid affecting the daily life and living habits of the aquatic organisms in the aquarium.

Choose legitimate brands and products with good after-sales service. When purchasing fish filters, it is necessary to pay attention to the brand and after-sales service. Choosing legitimate brands and products with good after-sales service can ensure their quality and after-sales service, and avoid purchasing counterfeit or unsolvable products.