The BioCompact line of internal filters is perfect for small freshwater aquariums and paludariums. These compact filters are designed to be discreetly installed horizontally or vertically. BioCompact uses biological, mechanical, and chemical filtration for optimal water quality and clarity. The inclusion of activated carbon granules optimizes your aquarium filtration and removes cloudy water, harmful metals, odors, tannins or other colors for clear, pure aquarium water. The diffuser with adjustable flow control provides added aeration through increased surface agitation. In addition, the BioCompact 50 has dual suction to prevent clogging. BioCompact 50 is suitable for use in aquariums up to 15 gallons. Designed using German engineering and manufactured in Italy, this energy efficient filter is supported by a 3 year warranty. Compact - Designed to be discreetly installed horizontally or vertically, this filter is perfect for small freshwater aquariums and paludariums Large filter surface for effective water filtration - Uses biological, mechanical, and chemical filtration for optimal water quality and clarity Carbon filter media - Activated Carbon helps to remove cloudy water, harmful metals, odors, tannins or other colors for clear, pure aquarium water. Quiet operation - Sound dampening design Suitable for use in aquariums up to 15 gallons Made in Italy, backed by German engineering Freshwater compatible UL certified filter 3 year warranty