Hey all! Great news... He is eating!!
Stuck a whole shrimp in the rock and he finally started nibbling. His side looks lots better. It does not look infected at all. I have not put any meds in and probably won't if it stays this good. He sleeps in a hole in the rock but always gets out and looks very alert when the lights come on.
I am very excited that he seems to finally be doing well. Talk about feeling guilty, I thought I had handed him a slow and painful death.
Thank you all for all the advice