This is my new 125 Gallon tank. I have a wet/dry sump, 150 powered protein skimmer, 2 36" dual lighting, 2 spotlights, and 3 pieces of fake coral.
You have to be patient and research everything.
Marbled Cat Shark, Spotted Sweetlips, foxface lo, puffer, 6 bar angelfish, Sohal Tang, Blonde Naso Tang, Purple Tang, chocolate chip starfish and niger triggerfish.
Bala sharks, silver dollars, discus, pleco's, rainbow fish, craw fish, american flag fish, damsel, crabs, clown fish, 6 line wrasses, diamond watchman goby, and snails.
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.