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Update: The Nodosus is still alive but still hasn't eaten. I did try the Ghost Shrimp even introduced them at two different times, just before lights out and early morning before lights on but haven't seen him eat. They are disappearing but since the tank is divided with eggcrate they could be getting over to the the Scherzeri side and getting eaten there.
The Nodosus still doesn't move much except when disturbed but is now grunting loudly when disturbed. The feeder fish one of the Scherzeri eats seem to spook him when they get over to the Nodosus side and he grunts and runs from them when they touch him. So he's got enough strength to make a short dash now. However he also developed excess slime just below his dorsal taking the shape of a band about 1/8 inch wide stretching from there to just before his tail on one side. Since the Nodosus doesn't move much and is easily viewed I look fairly often and see no injuries or other irritation that I can see as the cause of the excess slime. Even checked for Velvet with the lights off and using a flashlight. Still between the grunts and dashes I'm hoping that's some sign he maybe recovering.
Again Thanks guys for the posts and the helpful suggestions.