This was really tough to read through. The last thing you want to do with a stressed out sick fish with ick is throw it in a fw dip. For one it does not kill the ick as its been proven time and time again, and two, if the fish is stressed out the last thing you want to do is stress it out more. There are three options really imo, copper, hyposalinity or feed it with garlic, selcon, dr g's medicated foods. But please stop fw dipping this poor fish. If its not eating and just laying on the surface its most likely not going to survive at this point. The thing about ick is if you over react its always the fish that gets the butt end of the reaction.