I use the Silvergen SG6 When I set the dial for approximately 10 ppm it comes out clear and I have gotten lots of good results from this strength.
If I set the dial for 15-20ppm, it usually comes out an amber color. For some reason most folks around here distrust the solution when it is amber. So I stick to the clear solutions.
One friend had pneumonia that was not responding to Antibiotics or anything else. I gave him some 10ppm silver and a nebulizer. He was totally well within a week. I could give many more testimonials of friends or family I have helped with this but I figure you get the gist of what I am saying.