Would've updated earlier, but I went on a run.
Tomorrow is the last day of medication, according to the bottle. But he's still not any better. He's a tad more active though, still won't eat. I will try garlic soaked pellets again tonight.
I've been adding Tetra AmmoniaSafe every day, and a little pinch of aquarium salt. Temp stable at 74 degrees. Water very stained with tannins due to Almond leaves in there, that should help him.
After tomorrow, I will do a 90% water change, add salt and StressCoat+, and I will start the medicine cycle over again. Hopefully he will start to improve.