Which is best sts or colloidal silver and where do I buy solutions already made I can't buy sts in parts because of the danger I could have other people in my hose hold and the silver method I don't understand, as any brought any solutions from any online retailer they recommend because from what I've read eBay and Amazon are hit and miss has anyone had any luck with sellers on eBay or amazon they recommend, any help or info would be appreciated