Just to update, day 4 in CP hes back like his normal self, swimming around and eating very well. All visual signs of velvet are nearly all but gone. I started feeding it prazi/metro soaked food using 1 scoop of focus, 1 scoop of general cure per 5 cubes of mysis. I'm going to continue the 30 days in CP but at least this rules out being a bad batch.
CP really is amazing stuff. It's so easy to use and as you can see in the pictures, it is extremely effective for velvet and I highly encourage everyone to keep some CP ready just in case velvet finds its way into your tanks.
Before:
4 days After CP: