Originally Posted by CraigMac
No problem, glad I could help. Slate is Slate ... the metamorphic form of shale, maybe a few minor mineral differences here and there. Unless the slate from your fireplace was specifically treated with chemicals, then that slate could be used, just break off the glued edges. Slate, like brick, can handle heat well so it's ideal for use around fireplaces.
I used discarded slate people ended up not using for my tank.
75g Planted Barbs Denison, BlackRuby, Tiger, Albino Tiger, Green Tiger, Cherry, Gold, Checkered, Odessa.
NonBarbs Cardinal, Neon, RummyNose, Bloodfin Tetras, Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, Amano.