Is there an element that affects blue corals specifically? 2 of my Montis which are blue are getting slight white patches in the center, it is strange because they are the only corals affected and they are both blue. This happened to me once a few months ago and i resolved it after a week or 2, but of course i don't remember what i did. I have an icp test from last month when everything was doing fantastic, so i will send another one out to compare. here are some pics (it doesnt look as bad in the pictures but there are clearly white patches that are not spots of new growth.)
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