Description Warm Tips to Use the Aquarium Filter 1. When using for the first time, squeeze the sponge filter into the water tank for 5 minutes, which makes it easy to filter. 2. Use the water in the aquarium instead of tap water when washing the sponge. 3. It is recommended to replace the sponge and bio ceramic balls every 6-8 months. 4. This aquarium filter needs to be equipped with an separate air pump.
