Mike-

Don't know about the smolt fatility issue. However, I wouldn't put pro-cure on my own food.

Re-freezing eggs: I have never re-froze eggs.

Egg cures are top secret. I know several and if you're willing to cover a weeks worth of motel rooms and beer in Gold River, B.C. that would be a good start.

I will share this. I've caught a lot of steelhead on Pautzke's Balls-O-Fire eggs made into spawn bags. They last so long they have a half-life, not a shelf life. They don't work any better or worse than other eggs. This just allows me to save my good eggs for salmon.