I put together an effective "unit" by buying one similar to the one
referenced at 

 http://www.keephope.net     which is the "tackle box" type approx. $350
Next, disabling the air supply hose, and substituting oxygen (20lb tank
@ $80-deposit/ plus $10 fill up, and $175 for a regulator. 
   Now, fill ups are all that are needed.
  On the down side, you have no measurement on precise amount of ozone,
but for ozonated drinking water, I find that 10 minute bubbling at max.
does well. 
  The only caution I would  urge is low concentration when doing other
methods like rectal or vaginal or ear insufflation. 
    


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