Pepper Cory Lying Upside Down

Hi everyone,

Well, after having successfully treated ich in my tank, it seems one of
my cories isn't doing that well. I have 7 black neon tetras, 5 pepper
cories and 2 plecos. My temperature is back down around 78F and I
treated with salt and velvet. The ich on the tetras seems to be gone,
but this evening when I came home, I found one of my cories lying on
the gravel on his side. He is alive but breathing sporadically. I
tapped the glass and you reacted, swimming upsidedown mostly and doing
loops. He basically can't stay upright. I'm not sure if he'll survive
the night, but if he does, what can I do to help him out? I'd really
rather not be picking a dead fish out of the tank tomorrow, but it
looks like I might be doing just that.

My water quality is 0, 0 and I don't have a kit for nitrate, so I'm not
sure about that.

Thanks,
Chris