I was doing research on the biomax ceramic rings. I got probably more than I needed, and made my own intank wet/dry design. As I was reading I came across this. Quote: "The surface of BioMax is made up of a complex pore system that allows bacteria colonies to thrive, establish and multiply. Each ceramic ring contains at least 100 square feet of surface area providing more biological power than a traditional cartridge." I mean how is that even possible?? These things are so small and 100sq ft each?? I must have acres worth! Going by that math I should really only need like..5 rings. What's the sq footage recommend per 5 or 10 gallons?? I have a 30 gallon kinda overstocked tank so I wanted to make sure my filters can handle it. And they do, without any problem. But I mean..100sq ft each?? Does anyone know what the recommended sq ft is per w.e gallon(s)??