i'd chunk it and start fresh. the biorb "ceramic media" is notoriously sharp and a horrible substrate for bottom-dwellers. since most people ultimately want to add cories, loaches or plecos, you might as well use an appropriate substrate from the start.
get a nice rounded off gravel or use a sand substrate. if you decide that you would like to use sand, try to make certain that you get an inert variety. most playsands do well, but need a lot of rinsing. i personally have pool filter sand in my tank and think that it's great. most LFS also sell "aquarium sand" too. the aquarium sands are always more expensive that sand bought from a hardware store but are also guaranteed fish-safe (no chemicals, pesticides, etc.). just watch out for sands that "buffer" your aquarium or are otherwise calcerous. a silica sand is what you want.
