I make and use colloidal silver with a C.S. generator. It will only make CS in 5, 10. or 15 PPM. I use only 15 PPM, and it has been a miracle for my family. We have been using the CS for more than 5 years and during that time neither my wife or myself have gotten a cold. When we come home from being in public, we spray silver into our nose breathing in at the same time. There are so many things we have used it on including our animals. One of our horses cut herself to the bone below the hock. Normally this would have been vet call, sutures, a drain and antibiotics. We cleaned out the wound and began treating it with CS and Bluekote twice a day. The wound began healing from the inside and in about a month, was completely healed. Our vet was astonished. I’ve read some articles about CS being a waste, Don’t believe it. We are living proof this stuff is a miracle.