Happy New Year aging tree!
I've never used ozone so I can't comment. However, I have tried quite a few things as I use to have oxygen and breathing problems in the past. What's posted on this forum regarding removing heavy metals and also killing pathogens such as mycoplasma which can infect the lungs as well as others such as Newport's Vitamin D scriipt is the most effective in my experience.
After the info on this forum regarding heavy metals and pathogens would look at increasing zeta potential. Toxins such as aluminum lowers zeta potential.
Here are some quotes
"More zeta potential means more surface area for cells. Toxins, viral matter, fungi, and bacteria trapped between cells can be expunged more readily. More importantly, water enters cells more easily."
http://www.wetterwater.net/why_take_crystalenergy.html
"3–4 parts per million* of Aluminum in our blood Will Cause materials to come out of the blood plasma solution forming plaque on blood vessel walls. It also causes blood cells to clump together, thereby blocking blood flow to organs — causing strokes, heart attacks and other problems!
[ * About 27 milligrams of elemental aluminum in our body's 7 liters of blood will cause coagulation. ]
The reason this happens, is because Aluminum has a strong effect on Zeta Potential."
Anyhow, this product is effective for raising zeta potential in my experience http://www.iherb.com/Lumina-Health-CellFood-1-fl-oz-30-ml/7431?at=1 Note the reviews. Patrick Flanagans MegaHydrate is also ok. With that said, I'm never crazy about taking a supplement or similiar when I don't have to. Not to mention they can eventually get expensive. Ormus appears to be a very good option for zeta potential and has other benefits such as correcting DNA damage. I'm personally going to be using this method of creating ormus which will be free in the end and is natural. It's called magnetic water near the bottom of this page. It's said to extract the ormus out of the air and into the water and there appears to be some good reviews. http://www.hbci.com/~wenonah/hudson/ormusgas.htm
Beyond that, I also do breathing exercises as well. Said it works because it gets air to the bottom two thirds of the lungs where there is a richer supply of blood to allow better oxygenation. The breathing exercises also gives quite a bit of energy/prana/chi so I don't feel so run down.
Happy New Year again.
hope this helps