Bio-Bale Media 1 Gallon SURFACE AREABio-BaleTM allows a greater volume of fish for any given tank size than any other media SURFACE TEXTUREBio-BaleTM`s porous surface texture and optimum void space allows for greater water VERSATILITYBio-BaleTM`s unique structure allows it to be used in any size or shape biological filte