I have the exact problem with one of mine I don't know what to do. I do have salt in my tank, though. I took him out and put him in a bowl wiht a small part of an anti parasite tablet. Then I put him back in the tank, he kinda curled up and spazzed out for a while, now he dissapeared. ::shrug:: my other loach hides more so I don't know where he is, but last time i saw him i didn't see anything else. I too have shrimp in the tank so I don't want to put anything that would hurt them in there. I have already tried quick cure and anti-fungal stuff. This would be my 2nd kuhli to die, I'm about to give up on them even though they are soo neat.