Looks like AEFW. Best course of action is remove all sps from your tank 8 weeks + especially if you only have frags.
If you are starting new with SPS and already are battling this, it will be a uphill battle of maintenance, and from my experience and research, unbeatable for 95% of aquarists.
I see you are from Fontana, try local seller SPS Tank for your coral after fallow period. He quarantines all coral that he sells.