[rayjay]

I wouldn't expect it to be healed yet. While the antibiotics can be working just fine, it takes a LONG time for the actual healing to complete.
Just imagine say if you had serious burns to the same proportion of your body that this bacteria has affected on the seahorse. How long would you expect it to take to heal on you?
I've never had one with that large an infection, but ones with just the tip of tails can take many weeks just to either start healing or loose the tip and the new end to seal off.