For some context, my 120 gallon tank is about 6-7 months old, for about a month I've had four colonies in there but picking up alot more this week, my problem arises with my leptastrea, for the first few weeks he wasn't doing so good, closed up and stripped around the edge, here's what he looked like
Then I went on a 2 week vacation, I just got back and this is what he looks like now
I had my LFS watch my tank, and as expected he has lost a few more polyps (I'm pretty sure the white in between the polyps on the left is mucus) though I noticed he is more open/extended!?! Before I left the entire left side of the colony seemed to be retracted and irritated, but after he lost a few polyps he is more open?!? What is happening, were those polyps infected? Is this STN? What is going on. And what should I do?
(Again the white that isn't on the rim of the colony is probably mcucs, the white is only skeleton if it's on the rim)
Then I went on a 2 week vacation, I just got back and this is what he looks like now
I had my LFS watch my tank, and as expected he has lost a few more polyps (I'm pretty sure the white in between the polyps on the left is mucus) though I noticed he is more open/extended!?! Before I left the entire left side of the colony seemed to be retracted and irritated, but after he lost a few polyps he is more open?!? What is happening, were those polyps infected? Is this STN? What is going on. And what should I do?
(Again the white that isn't on the rim of the colony is probably mcucs, the white is only skeleton if it's on the rim)