Hi, I have just noticed these brown spots over several of my LPS corals! I am wondering if I should be concerned about this? Other than this I have seen great growth and polyp extension from all the corals specifically from the octo spawn which has had its sweeper tentacles out most days. ( keep in mind all the corals are closed up right now ) I do have a cleaner shrimp the sometimes irritates the corals. If you have any tips or information please let me know! Thank you