Thanks for all the comments.
I'll try using aged water from an aquarium. In answer to people's questsions:
1. I have watched the video a couple of times. That's the kind of hatch rate I'm looking for.
2. I will try aged aquarium water next.
3. I do have air going enough to move the eggs around but not a rolling boil.
4. I've used two tablespoons salt in the ziss.
5. I've modified the air line like Cory did. So obvious, I kick myself for not thinking of it.
6. I'm going to compare the same process to another brand and see the result.
Thanks,
James