Yes MOST,but when you have a 48x18"footprint with 4" of substrate,then you have major additional colonies.........sirasoni;896963; said:most of the bacteria is in the media in your filter(s) anyways. i have both right now but i definitely prefer bb.

Largemouthbadbass;896973; said:Yes MOST,but when you have a 48x18"footprint with 4" of substrate,then you have major additional colonies.........