Lava Rock

  • We are currently upgrading MFK. thanks! -neo
That Lava rock for BBQs isn't treated, but the link you posted those pieces are small 2-3" I would say. Not sure if you are looking for bigger lava rock, do they give you the option to order larger stone.
 
Clean it well and you will be ok.
New tank or established? If its a new tank do a few water changes with the rock in the tank while it establishing just to get it clean, and let the bacteria eat any orgasnisms and get your BB attached.
 
Clean it as said and it should be fine, you might also check with your local HD or Lowes to see what they have. Might be cheaper and no shipping involved. I've gotten bags there for a few dollars each.
 
MonsterFishKeepers.com