Matala USA offers the BioSteps Filter featuring six sections for step-wise filtration from mechanical to biological. The filter measures 23-in. long x 15-in. wide x 20-in. high and offers 200-sq.-ft. of surface area for bacteria growth, 10-gal. of Matala media and open cell foam, rugged construction, large inlet/outlet hose fittings and flow rates up to 1,000-gal. per hour, the company states.