The main requirement here is that you will need an ozone generator that
has a pure oxygen source (like an oxygen tank or oxygen concentrator).
If money is low, go with a welding oxygen tank. You won't be able to
get a medical oxygen tank filled without a perscription. The oxygen in
the tanks are the same.
You will need a low flow regulator that fits your tank. For example, if
you get a welding tank with CFA-540 valve, then get a low flow CFA-540
regulator. By low flow, that means it should be able to go as low as
1/32 liters per minute. I got mine from appliedozone.com
With the ozone generator, basically it depends on what you can afford.
You can find them on ebay that allow you to use a pure oxygen feed for
as little as under $100. If you want true medical grade you'll need to
pay quite a bit more than that. In my personal opinion, as long as you
have a pure oxygen source, you don't need medical grade to do insufflation,
since it does not produce any NoX. Then again, that's merely my opinion.
Also, I got rid of my brian fog with pure MSM powder (I got it from
msm-msm.com). You can read more about MSM at: http://www.msm-info.com
And sometimes brainfog can be the result of a candida yeast overgrowth.
If that's the case, candida can be tricky to get rid of. If nothing else
works, you should look into the Beck protocol (see toolsforhealing.com).