SOrry but You need to de-populate or get a bigger tank quick. Your blue face needs at least a 125g. Even with a 125g you would be over stocked w/ current population. I think I saw in previous post that you had a sweetlips, puffer, bluface, foxface, parrot fish and more. Hopefully I'm wrong and you actually have 2-75g's which would still not be enough because of the adult size of these fish. They all need larger tanks.Way too much for a 75g and too much for 125 also.
Sorry for the bad news.