Hi Dan

Do you mean 'man made lava rock? "The book of the marine aquarium" by Nick
Dakin advises that Lava and Tufa rock are the best rocks to use in the
aquarium (besides live rock...). Volcanic rock would of course be high in
contaminants such as sulphur.

I've had issues with Tufa before as it wasn't as easy to clean as I first
thought...

Regards

Chris


"Steve Sells" wrote in message
nk.net...
not easy in the home. if you don't know its safe, then play is safe, we
all
have too much money involved in out tanks to take risks.

Steve
"Dan Norgard" wrote in message
...
No, so far I'm just toying with the idea. How do I test for all that?
Thanks, Steve
Dan


"Steve Sells" wrote in message
ink.net...
depends on what is in that rock, have you tested them for Iron, and
heavy
metals, for a start for toxic things... ?

Steve


"Dan Norgard" Can Volcanic Rock be safely added as a base to the LR in
a
cycling tank ??

Thanks,

Dan