This afternoon he's looking better activity wise but there's definitely some fungus growing in I can't get a good picture of the body because he's hiding behind the driftwood but here's a picture if the fungus growing on the head.
It's right behind the left eye.
I need to move him into qt but the only spare tank I have is a 10g and he's about 14" long. I'm going to assume that this would be too small for him?
I agree , A move will add stress , stress is the worst thing for recovery. Lowering water levels is also a great suggestion boosting aeration and WC's with some Salt should be plenty to turn him around.
I doubt it's Fungus your seeing, as part of the healing process he will start to shed away the slime coat which will look like stringy/fuzzy white stuff sloughing off the body. Completely normal after a trip onto the floor.