I was inspired by a post here on using slate tiles for aquarium decoration. I went to Home Depot, got a slate tile, smashed it up, sanded the pieces I wanted and put them in my tank. I have one fairly large leftover piece that I would like to place leaning in a corner of the tank or leaning over my heater so that it does not show. Is this safe? To give you an idea of the size on the slate section, I offer the following photograph.
NOTE: The ruler is calibrated in centimetres and the slate is around 1 centimetre thick.
NOTE: The ruler is calibrated in centimetres and the slate is around 1 centimetre thick.