What are fish tank filters made of? In the modern home life, the fish tank has entered the family life. When choosing a fish tank, the choice of filter media for fish tank is even more important. However, many people don't know much about fish tank filter media. Therefore, many people do not know what is the use of such products. They don't even know what classifications there are. Let's take a look at the fish tank filter material together. The fish tank filter is a device used for purifying water and supplementing oxygen in fish farming equipment. The purpose of the best water filter media is to remove feces and other contaminants in the water, and to keep the water clear, adequately oxygenated, free of harmful substances and pollution, suitable for the growth of fish. With a good filter device in the fish tank, you can keep the fish well and change the water less. Therefore, the fish tank filter is the main c…