So in the last day or two I have noticed that there seems to be a bald spot on my monti, it looks like the polyps might still be there but they are closed up and a few are black. The rest of the coral looks fine, what could be the cause? I tried taking a picture but my camera does not have the resolution to be able to see the area. Also is it normal for the polyps to not be evenly distributed on the coral? They seem to be more densely packed on one side of the coral than the other. Also my levels are all with in range and have not changed recently, nothing in the tank has. Only fish in the tank are a gold assessor and green Mandarin. Thanks for the help! Posted this from my phone so please excuse any typos