The BioTec filter sets the tone for a peaceful and beautiful outdoor space by providing a clean and clear pond—quietly. For koi and larger ponds, BioTec is a multi-zone filter for ponds up to 32,000 gallons. It offers special filter foams, a self-cleaning screen to separate coarse debris, and algae reducing PhosLess Modules, creating an efficient and low maintenance filter. This filter is eco-friendly—it provides a sizable surface for the settlement of beneficial bacteria. When used in conjunction with the BioTec; the AquaMax Eco Classic, AquaMax Eco Premium or ProfiMax and the Bitron C qualify for the OASE Clear Water Guarantee.