So I got some peices from work, and put some acid on it. There was no major fizzing, maybe just some tiny, tiny bubbles. I tried searching but had zero luck. Does anyone know if this is safe? I have about 10 medium sized pieces.

dogofwar;2218654; said:Put a piece or 3 of it in a 5g bucket with a sponge filter and a couple of goldfish, guppies, etc...if they're belly up, then it won't work.