One more time, there is no such thing as a product which is made up of single silver atoms. It is impossible to make. And the product you are talking about, where they once claimed that they were shown a secret method of production by extraterrestrials (I kid you not!) does not have particles that are even close to as small as the leading brands. What it has is a whole lot of silver. Way more than most who know their silver will tell you is needed. Anything much over 20 PPM is overkill - and if you have to take more of it, then so be it. But 18,000 PPM? Drinking a glass of that would be like drinking 900 glasses of 20 PPM silver. It is hard to take so much silver that you get the rare skin condition known as Argyria - but 18,000 PPM would be much more likely than products with reasonable silver content.
I am glad that the high PPM worked for you - but frankly I consider advice to take anything with that high of a concentration to be dangerous. Question: if you aren't spamming for that company then why do you continue to make posts about it?