Sometimes the silly things just close up for no apparent reason.......Several days to as much as a week or even weeks later they open back up.
A little extra flow from a PH on them sometimes opening them back up.
I had a chance learning experience with them a while back
and have seen it happen now time and time again in my tank.. I had placed a big chunk of Zoas down on a larger spot of GSP's.....Within minutes
almost all the GPS in the tank, some 4 or so feet away closed up tight......The next day all of the little coral weeds where still closed....
This was at least 8 or 10 patches of them, some very large, some small. It was about a week till the reopened. The only assumption I could draw from this was some kind of a biochemical signal to the other GSP groups of impending danger.?????.......
I have not yet read of any particular chemical release issue with GSP, but it is about the only assumption I can draw from seeing the event occur many times ..... In other words maybe they do this as a protective measure somehow.
But they do close up from time to time for what seems like no apparent reason. But it never fails the pretty little animal weeds of the coral world will with time open back up. Good luck with yours, they are tough little critters, they will come back.
