The ASAP filter combine high performance and great usability features with a clever design that reduces the time required for maintenance works. The sponge is quickly populated by beneficial bacteria, so water passing through the filter undergoes biological as well as mechanical filtration. It also ideally suited for use in aquaterrarium, since they can operate in shallow water as little as 5 centimeters deep. Thanks to their functional properties, these filters can be used by beginning and experience aquarists alike.