I have been going the h2 gas route rather than try to create h2 water. The reason I avoid the water tec is for one thing we do not know what contaminants are in the mg.
You want to avoid contaminants in the magnesium, so you buy yourself a large tank of industrial welding hydrogen that may contain unknown contaminant gases, and instead breath that!? Interesting logic.
"may" contain contaminants? What contaminants do you suppose will be there? Something diabolical like lead? No, that does not vaporize very well or any of the metals. What then? A trace of moisture, nitrogen, oxygen? The fact it is a gas and is in most cases made by electrolysis means there will be no contaminants. Industry standards say it must be at least 99.95% pure and usual contaminants are nitrogen or oxygen, hardly a concern https://www1.eere.en...kshop_smith.pdf So here we have a document outlining industry standards while the exact composition of the fire sticks is largely unknown
Otoh, those fire sticks are made of solid metals, they are cheap which means purity is not a big factor as long as they burn. Which would you like to consume?
>The "test tube in a bottle" method of making hydrogen rich water does not involve drinking the magnesium, because the magnesium is kept within the test tube, and does not enter the drinking water.
That is certainly an improvement since the mg alloy is filtered from entering the water. However, even if it was as pure as breathing the gas itself, you have the considerable trouble of setting it up and doing the reaction yourself. How do you know your system does not produce any harmful gases? You speculate that the hydrogen in a tank has some unspecified harmful impurities but have given no evidence to go along with that.
With my system I take the foil balloon filled with h2, open the valve a bit and take a toke of gas. I hold it in and notice effects right away. Not saying drinking the water is bad or that your method is bad, just saying criticism of my system is no more than speculation. I like my way for the convenience, its quick, I don't have to remember to set up the chemicals and equipment, I just open the valve and away I go. I can also produce h2 water with it very easily.
Some will prefer low cost tecs and not worry about contams and not be concerned about the amount of work involved. Your way does sound better than the low tec methods being promoted by others.