Questions - Need some input

I have thin yellowish brown hard bristles growing out of rock . Looks like a old toothbrush bristles

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When i first got this frag it stayed open and was healthy looking then it started shrinking up. I thought it was just shedding and it seem to be but its been closed up for a month now opening part way for a few days every ten days or so. All my sps, lps, shrooms and gsp are growing and have full polyp extension. I have tryed moveing it around in the tank with no great results, It is bigger then when i got it with more branches but stays drawed up. There is no ...

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