Re: Inflammatory breast cancer or mastitis?

 Another thing -- how large of an oxygen tank should I get?

You want the largest you can comfortably carry or move around.  The reason is the fill costs are about the same regardless of the size of the tank.  I prefer 125cuft tanks myself since they are easy for me to carry but are large enough to last quite a while.  

Another thing I used to do was I got a custom connector from the welding supply that connected my big tank to a "pony" bottle.  This allowed me to fill the pony bottle from the big tank.  Pony bottles are small and I had a carrying case for it so I could easily take it and the ozone unit with me.  If you do this research filling tanks though since there are things to keep in mind such as pressures the tanks are rated for and the heat build up from filling.

If medical tanks require a prescription, would welders be able to supply a welding tank, instead, and fill it on the spot?

Yes, all oxygen sold has to be medical grade by federal law.   You can actually buy a tank or rent a tank.  Either way you will have to buy a regulator since they do not rent these.  Then add a hose barb to fit the tubing for your machine.  And whether rented or bought you simply take the tank to the same company and they will swap you out with a filled tank each time.

Also, the Rife machine -- it has an amplitude setting that, once you move it high enough, will make you feel a tingle from the electricity. If you move it up even higher, it's painful.

I used to set the units to the highest level it could be tolerate without being uncomfortable.  The more salt added for a conductor the less power that is needed to reach this level.  So the setting will not always be the same.

Is there a specific amplitude setting that's best? Is a "slight tingle" enough?

Answered above.

I ask because, according to "The Body Electric," stronger currents are not necessarily better, and can be damaging, even if they feel low.

The best way to explain this is how my father put it.  You can charcoal the outside of a steak and it still be raw in the middle.  In other words applying too much energy is like charcoaling the outside of the steak.  It does not mean the energy is doing much to the body inside. So it is correct that more is not better.