This is NOT air, it is the Molecular Hydrogen which is a gas.
The spurting happens because Molecular Hydrogen has built up in the UltraStream overnight and/or when it hasn’t been used for a while.
The first water that comes out of the UltraStream is the best as it will have the most of this anti-oxidant and anti-inflammatory quality.
If you want to get the most Molecular Hydrogen from your water drink it fresh, straight from the UltraStream.
It is like an orange; when an orange comes fresh off the tree and it is cut in half, it has its highest anti-oxidant quality.  Leave the orange just sitting open and the anti-oxidants leave the orange.
Put the orange in a sealed container in the refrigerator and the anti-oxidants will last much longer.
Like an orange, if you can’t drink your UltraStream right away, store it in a sealed, preferable glass or steel container, and if possible, in the refrigerator.