Ultra-porous Biological Media w/ Superior Performance Characteristics Overview. Designed for a pH of 7.5+ in marine & hard freshwater aquariums. Incorporates NanoIntelex Technology for a vast surface area, promoting colonization by nitrifying bacteria for fast nitrite/nitrate conversion. Offers the highest colonizable surface/volume ratio of synthetic bio filtration media. Greater efficiency requires less space for equivalent nitrification. Reduces ammonia and nitrite quickly in heavily-stocked tanks. Can be used with Xport-NO3 & Xport-PO4. Sizes: 150g, 300g, 1,000g. Instructions & Guidelines: Read all instr. before use. Pre-filter to remove particulate organics to improve efficiency. Rinse Xport-BIO & seed it with 20-ml MicroBacter7 in a pail. Leave for 24 hrs. at room temp. Pour water into aquarium, place Xport-BIO