I have a leather in my tank that is not opening at all during the day, but early in the morning I notice a few of the polyps open when the lights are still off. It is on a coral plug in the sand bed, and not directly under my kessil 360, which is running up to about 40% max intensity during the day.
This has been going on for probably 2 months now, and I can't figure out what gives. No other corals within 6" of it, so no warfare going on, and although it has shrunk up considerably smaller than when it was originally extended, it looks healthy otherwise. A few SPS and LPS in the tank, and all are growing and doing well.
Only having polyp extension at night initially made me think the lights were too bright, but I've tried shading it and didn't see any change.
Any ideas?
This has been going on for probably 2 months now, and I can't figure out what gives. No other corals within 6" of it, so no warfare going on, and although it has shrunk up considerably smaller than when it was originally extended, it looks healthy otherwise. A few SPS and LPS in the tank, and all are growing and doing well.
Only having polyp extension at night initially made me think the lights were too bright, but I've tried shading it and didn't see any change.
Any ideas?

