I'm coming back to the hobby after a 18 year break. My original tank was a 100 gal, 5 inch sand bed , 40 lbs live rock, 4x96w compact fluorescents and a cpr backpack skimmer. As far as livestock, I had a blue tang, dragonet, 2 clowns, a cleaner shrimp, a tuxedo urchin and a red and black Sea...