While I have not had an annularis in a reef, we have a blue face and had an emperor which are from the same Pomacanthus family - all are which are considered "reef safe with caution". We planned the tank with this I mind (in addition to the blue face we also have regal and gold flake angels as well as a Moorish idol) so we have an SPS dominant reef with couple of euphylia and leathers. We have had no issues with any of these corals but we did have a couple of zoa colonies that did not fare well. Overall, well worth the limitation on corals to keep these fish. Good luck!