Just wondering if anyone has bought this base rock? It seems significantly cheeper than most other stuff out there. Says it's calcium carbonate so it should be ok right?
http://www.aquariumsnstuff.com/prod...d=244&osCsid=e737f431b8d388c16cc6a986d137b827
http://www.aquariumsnstuff.com/prod...d=244&osCsid=e737f431b8d388c16cc6a986d137b827