either not enuf lite or current. put him on the stablest rock highest and closest to the lite and powerhead. keep him away from the filter intake though, he can get sucked in.:scared:
Something is probly wrong with your water because your shrooms on the same rock are closed also. May need Iodine...you should test your water chemistry
I've had that problem too. That's how mine looks when it's starting to die. Hopefully that is not your problem. Do you feed it. I use DT's phytoplankton and by the next day it looks better.
Is that because it feeds off of whatever is in the water? I notice that my mushrooms get quite large after I dose with the stuff. They can go from the size of a quarter to the size of the bottom of a 20 OZ bottle of pop (or soda whichever you prefer to call it.)
