The new EHEIM Air filter is an ideal internal filter for small aquaria or quarantine and breeder tanks. The filter is modular developed by -click together- tubes. The thick filter sponge gives excellent filtration, while protecting small or weak fish. The EHEIM Air filter can be extended in many different ways (e.g. operation with two sponges) by using the extension set or accessorie parts of the EHEIM InstallationKit. For the operation you will need a conventional air pump (not included).Do you have questions about this article ?