So, my grandfather is getting a 125 gallon aquarium. He is already successfully running a 37 gallon FOWLR tank with a pair of Ocellaris clowns, a fire fish, and a cherub dwarf angel. Since he works a lot he depends on me for the research, I love it. So since I picked out the fish for the 37g,I need help for the 125g. What is a good group for this tank? I know I want to put some powder blue tangs, and yellow tangs in it. Are Triggers compatible with those? Also how many fish are allowed in this tank? Thanks