Lava rock as Live rock?

[Narazbad]

I've been doing a little bit of research and have been wondering about using volcanic lava rock as live rock in an aquarium. A few people I've talked to have stated that it is decent for fresh water or pond settings, but bad for a reef aquarium as it could potentially leach unwanted minerals into the water. I haven't looked too heavily into this option but decided the first step would be to ask you guys. So, lemme know what your opinions/knowledge say and help me figure out what to do!

[fishman]

I think thats what I got as well usually alot of iron in lavarock I have trhown a few pieces in as frags but to much might not be good

[TheGreatAukSociety]

The problem with using alot of volcanic rock is that the term volcanic rock is so broad, you could literally be adding thousands of different rocks, with thousands x thousands of mineral composition possibilities. So it's kind of a **** shoot as to what yours will be.

[Narazbad]

Understood. I have a sample of this stuff that I found in town. Very porous and light, almost looks like black florist styrofoam.

[RickMartin]

Don't use it.