IMO I'd be concerned about the flat worms for sure, look at some pictures on here to confirm and start dipping and searching and removing eggs if you can find them. I've had them become a plague and wipe out SPS.
Tank and room looks great. Do you have any small holes below the water line on any of the lines back to the sump to break a back siphon in case of power failure?
Tank and room looks great. Do you have any small holes below the water line on any of the lines back to the sump to break a back siphon in case of power failure?