That's exactly what I've been doing. He's in a 3/4 gallon bowl right now that gets a water change with salt and stress coat every day, and he's been doing fine so far. Like I said in my first post, its very mild, and I've only seen about 3-4 bits of fin fall off over the course of 3 days, and nothing broke off at all today, so I think he's recovering nicely either way.
I just thought that since I already have the bottle I might try using it if it could help. I'll try adding a bit tomorrow and see how he does with it.