The BioCompact line of internal filters are perfect for small aquariums and paludariums. The BioCompact 25 is a discreet and compact filter with adjustable flow control. The 3-stage filtration of biological, mechanical, and chemical ensure effective water filtration and optimal living conditions for freshwater aquarium habitats. The fine active carbon foam in the filter ensures the removal of contaminants and impurities through chemical filtration. This filter is suitable for use in aquariums up to 7 gallons and paludariums with a water reservoir of up to 7 gallons. This energy-efficient submersible design can be discreetly installed horizontally or vertically. Designed using German engineering and manufactured in Italy, this extremely quiet operating filter is supported by an included 3 year warranty.