To everyone who, helped. Thank you very much, Red died some time in the night.
It looked like he had contracted a secondary infection in the night ( of the fungal variety) that the salt didn't prevent. He just couldn't handle getting a second one. And passed on. I think it was a quick death, at least I am going to think that way.
Thank you for your help. I just didn't catch it in time. I am sure I i had, your advice would have helped him pull through. thank you for your time.