I am definetly going to call and see what they say. Hopefully they aren't anything like Utopia and at least answer or respond to me.
A manual override would be great, but I don't really see myself needing anything over 20 ppm., but it would be nice to at least reach that point.
I finally had a need to test out the product. For the past 1-2 days I had a pain inside my ear that was radiating into my jaw. I put a few drops of the 7.2 ppm stuff into my ear canal for a few minutes before bed, and when I woke up it was gone, and still is. So for external uses, it's golden for sure! :-D