I'd recommend adding the rock but holding off on the corals... if you add too much livestock too quickly you aren't giving the biofilter enough time to adjust, this can cause water quality issues since the tank is so new.
Biggest issue with lava rock is the fact that it contains a large proportion of silicates, which are nice perpetual algae/diatom suppliments. It can also have other trace elements that you don't want.
Live rock is old calciferous skeleton. Dry rock is generally okay as well. Honestly with "new" live rock, used and dry rock it's good to have a very close look at it to see what you're getting. When you're new to the hobby it's easy to miss potential problems as everything is so new to you.
Education and patience.
|