Most quality home generators produce silver in particles that are pretty small. By the EPA's own figures, 90-95% of ingested silver is eliminated from the body within two days and about 99% within a week. I don't think buildup is really an issue for 20 PPM silver taken in reasonable amounts. And I note that the bluest of the much-ballyhooed blue people, Papa Smurf Paul Karason, made his own ionic silver with tap water, further contaminated it with salt and drank over a quart a day for months on end. As a result, he produced silver chloride in quantity and that will indeed turn your blue when you consume that much of it. Even so, what the mainstream media says little or nothing about is the fact that he was given a clean bill of health at Mount Sinai hospital.
A stirrer is a handy device to have, but you can do it manually.