Macro Media's reef rubble size range creates the perfect refuge from predation for detritus eating macro organisms and sponges. In turn, the reproduction and growth of these creatures provides a steady supply of food for your hard-to-feed reef inhabitants such as corals, clams, and sponges, as well as traditionally difficult to maintain fish such as mandarin gobys and certain angelfish. Macro Media also aids in natural filtration by creating a shaded cryptic environment ideal for encrusting living sponges as well as nitrate ammonia and nitrite reducing bacteria.