What I would do is......... Setup tank with lighting, filtration, skimmer, substrate (LS
and water. Start the system and monitor levels in Display & Sump and adjust flow rates as req'd........ once all is running well and no leaks are present you then sit and wait......... test your levels and are waiting for a spike in Ammonia...then Nitrite....finally Nitrate. If the rock is already cured then this will happen quite fast but it needs to be the system as a whole that matures rather than just the rock.....be patient this can take a number of weeks. Once you are happy the system is settled in ALL areas I would then add a Clean up Crew (LFS
will be able to help). Again a few weeks after find a couple of cheap hardy fish to add and monitor all levels for a few weeks to see how the system copes witht the bioload (fish mess, old food etc). As you add things take your time a reef isn't considered mature till 12 months plus, you will still see the system doing strange things as it settles over time. Above all ENJOY the hobby! Hope this helps and this site is a fish knowledge vortex and will help you greatly, just ask no matter how daft you think it may be!