LOL! I was going to post a newer member hade great site for making LR
, but it was you!
What's the latest on live rock supply? News?
Hmmmm, I doubt it would leach any heavy metals into the tank, but then that might depend on where it comes from.
Reaching waaaaaay back to to my geology in college, pumice is not really classified as a true rock. It comes from the "foam" of an active volcano. Really the only issue could be if it contains silicates or not. Silicates can cause diatom blooms, but they burn themselves out.
I'd be interested in what others have to say.
One thing, you probably pay less for shipping, based on they are very light! LOL!