Re setting up - use live rock(1.5 - 2 lbs/gal) and live sand. Use r/o or distilled water - Cycle the tank with it for 3-4 weeks then add clean up crew - then 4 or more weeks later start adding corals ( get adequate lighting i.e for a 20 gal high- light system for 20 high
This one... 24" ORBIT...