Awesome, Thanks for the detailed advice.
I think your are spot on with the reasons why the adults died. The shipment was transported from BC Canada to Alberta Canada. (The two locations have very different water)
I really hope my male are not sterile. That would cause a bit of complication. Maybe I will buy a few males and add them to the tank.
I have tried blanching lots of different veggie for them but they seem to not like it. The only exception are peas. They do love that. I will try and reduce my feeding.