It is common in FOWLR tank. I have loss Regal, blue lip, king, Poma, French and half moon angels, also brown powder tang, black powder tang, ABT within 2 weeks last time. Sometimes, it just outbreaks
Your loss should be less than mine. Just hold on and learnt from it. Cheers..
I also thinking of convert to LPS reef tank. I also heard it is more easier.