I'd stick with once a day or every other day feeding, they will be fine. My fish sometimes do the swarming thing for food but you can't give in LOL
I would add another powerhead in that sized tank, one on each side. You can point thyem at the front glass and towards the others flow to create a crazy tank wide turbulence. Thats' what i do anyways hehehe
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.