I have done colloidal silver many times. I get many times the pollen I need to pollinate a lower branch on my 9 ladies. Best to make CS, as it has a short shelf life. Easy to make, and has always worked for me. Yes, gotta spray daily for a month. The STS sounds interesting, but I have a $60 investment in my piece of 99.9 silver wire, and know the process. Glad to answer any questions.