Dude, I'm not trying to tell you how your tank should be, but hear me out... Those tangs need a way way bigger tank. I'm usually against people telling me I can't have a tang in a smaller tank and I personally have a small yellow and blue one, saying that your tank is far too small for the naso tang and countless other fish you have there. It feels more like a restaurant tank where you pick out a fish to eat than something a hobbyist would do. You should consider removing 50% of the fish.