biOrb Ceramic Media is used for the growth of the biological part of your aquarium's filtration process. This porous surface media allows the growth and colonisation of this benifical bacteria. The bacteria thrive on the masive surface area, these man made clusters provide, along with a rich oxygen source and fish waste. The biological bacteria help maintain low ammonia levels that are toxic to your aquatic creatures.  
Part# 46023
Box includes 1lbs of media
See chart to best determine the correct amount of matieral needed for your size tank.