Hello: I am in process of rebuilding my 800G tank. 'L' shaped 5'x10' i would like a school or multiple yellow tangs. I currently only have 1 large blond naso. Would also like 1 purple tang. I'm looking for advice on the number of yellows. When i had this tank setup years ago i had 1 blond naso, 1 purple, 1 yellow with no issues. I was hoping to have like 7 to 9 or more. In the old tank i had issues with other schools of fish. I started with about 13 blue green chromas and the school would bully the weakest fish and about every 2-3 month i would loose one until just 1 was left after several years. I had the same issues with a school of lyretail anthias. I would like to here from people that have had sucuss with multiples for years. I have great luck with tangs, mine have always been very fat.