The AquaTop IFS series of internal aquarium filters are small and powerful. The IFS filters feature a spray bar for a wider range of water output and more evenly dispersed water. Each filter comes equipped with dense filter sponges for your form of mechanical filtration. For chemical filtration, each filter comes with activated carbon that helps remove odors, water discoloration, and harmful waste. In turn, the IFS series will help you provide clean healthy aquarium water. The IFS series filters are designed for use in aquarium corners and are suitable for freshwater or saltwater.