I was at the LFS today looking to swap out a couple of pieces of rock in my tank for some new base. Anyway as I was rummaging through the bulk rock area the guy told me that it was "bowl rock", not a term I'm familiar with. He said it was used in both FW and marine aquariums. Have any of you heard this term and if so is this guy being straight up? I assume with it's porous nature that it will become live after it colonizes, but I want to make sure it's not going to leach in a SW environment.