As I understand, though happy to be corrected, you need 99% helium to be successful. They added the extra oxygen content to stop people CTB without affecting the inflation performance of balloons.
Reactions:
rozeske, YosemiteGrrl and Black Sheep One
As I understand, though happy to be corrected, you need 99% helium to be successful. They added the extra oxygen content to stop people CTB without affecting the inflation performance of balloons.
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