210 Gallon, 72" Aqualight Pro HQI Metal Halide/Compact Fluorescent w/ LED Moonlight, Coralife Aqua Chill 1/2 HP Chiller, Coralife Super Skimmer
If you are not sure, ask someone who knows! These are living creatures and not science experiments.
Black Tang, Naso Tang, Sailfin Tang, Regal Angel, Scribble Angel, Blueface Angel, Queen Angel, Foxface Rabbitfish, Green Mandarinfish, Moorish Idol, Mated pair Pajama Cardinals, Coral Beauty, Yellow Tang, Flame Angel, Chromis, Ocelleris Clowns
If it ain't broke but you want to replace it anyway...make it look like an accident!
When you see signs of stress in your fish, you can then take steps to identify the source of that stress and then to resolve it before it becomes a major issue.
If you're looking for a unique way to stock your new tank, give freshwater shrimp a try.
If your fish is suffering, you may want to consider euthanasia as an option to humanely end his pain.