crocea won't mantle out all the way

[cook]

I recently upgraded my tank on sunday from a 60 to a 75. After doing so the ph dropped slightly. My crocea doesnt open spread out its mantle all the way. It seems to be open as far as normal. The clam still reacts to light changes and shadows, seems to be more jumpy when fish come around.

 

[derrikd]

might still getting used to his new home... is any one bothering him? the lighting the same?

 

[cook]

The lighting is the same if anything it might be less intense on him. The lfs said that he should be acclimated already. It has been 4 days.