The BioPlus line of internal corner filters are perfect for medium-sized aquariums. The BioPlus is designed for discreet corner placement. The integrated diffuser with adjustable water flow nozzle allows for uniform surface movement, prevents the formation of biofilm, and provides additional dissolved oxygen to the water for ideal water quality. The 3-stage filtration of biological, mechanical, and chemical ensure effective water filtration and optimal living conditions for freshwater aquarium habitats. Filtration media is individually housed in separate modules for simple cleaning and maintenance that can be removed while the filter bracket remains in place. Designed using German engineering and manufactured in Italy, this energy-efficient design incorporates dual suction to prevent clogging. This quiet operating filter is protected with an included 3 year warranty with a free 1 year warranty extension with online product registration.