Aqueous solutions of methylene blue or fuchsin have little or no bactericidal action, even in dilutions as low as 1-200 and 1-500. 2. Aqueous solutions of gentian violet have a marked disinfectant ...
However, internet sleuths believe it was methylene blue, a substance originally used as a Victorian-era medicine and now known for disinfecting fish tanks. The video went viral after Vance Elrod ...