Devil Hand

I've had my devil hand for about 5-6 months, recently its been shriveled up, sometimes it does look nice, but now the back of it looks bleached basically, and its shriveled up, any ideas?
 
0 nitrate, 0 phosphate, 1.025 SG, I just got back from my LFS and bought a refractometer and a pippet and phytoplankton to feed my devil hand, I'm pretty sure its because I wasn't feeding him, I just fed him a few minutes ago, so we'll see :), also bought a beautiful cabage coral, my tank is 8 months old btw.
 
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