I used set Automatic Weights when Parenting the Mesh to the Armature. However the Oxygen tanks are assigned to all kinds of bones. How do I remove all bone weighting from the selected Mesh?
I could go into WeightPaint and select every single bone and make sure the Oxygen tank is nowhere selected. But that would be a terrible inconvenience. And setting Vertex Weights in the right Panel of the 3d-View only sets the weights for a single Vertex.