[bbqthis]

So I've been looking around for some rocks to start up my new planted tank and I have some sphalerite...which smells like sulfur when scratched or broken. Is this aquarium safe?

 

[Imi Statue]

A quick search for it with google would have this.:icon_eek:

http://webmineral.com/data/Sphalerite.shtml

Too many heavy metals and the sulfur would kill everything in the tank quickly.