Thanks! I printed off your response. AND it just so happens...I have an empty liter bottle with the stopper you recommend that I could not throw away because it was so neat. Original use -- olive oil. I doubt I will find a DIY wine store down here in Mormon Hurricane, Utah. I am going up to Salt Lake City the end of the month. Now the trick is to remember to get the metabisulfite while I'm there.

I use distilled water and just top off the humidifier each day before stowing the BIPAP and accoutrements. I hate to have my bedroom look like a hospital room, Makes me feel old LOL! And I seldom feel old; forgetting I am turning 82 this month. I have a reverse osmosis on the kitchen sink. I used that for awhile, but got a film of mineral on the heater part of the humidifier. Distilled water is cheap enough that I don't resent having to buy it.

Now from your very fine description, I couldn't figure out how much of the solution is enough to roll back and forth in the tubing. Hope I'm not too much of a pain asking all these questions.

Dana