I know I am not going crazy, but I can't think of the name for the life of me. I have a shroom box inc because I am tired of shrooms detaching. But I saw some stuff I really liked as substrate. Broken rock can work and I may go that route eventually. But there is some stuff that looks a bit like crushed coral, however it was in the same shape as those yard turds that are made when they aerate your ground. Or like a straight cheeto. Does anyone have any rough idea what that might be?