So I am big into pool playing. I'm on a league and I play everyday. And I goto thinking. Can pool table slate be used in an aquarium. I did research and pool table slate and slate rock are the exact same thing. I also read in a few different forums saying that it can be put in aquariums. What does everyone think? I have 3 pieces of slate in my garage from my old table that I was thinking of breaking and using in my tank.