I never thought this was possible with gobies but my Yasha goby went through 1 formalin bath, 3 weeks of copper and 1 week of Prazipro. Now she's in clean water, eating pellets and trying not to get bullied by my clowns.
https://youtu.be/8oVjHGLhOA8
https://youtu.be/8oVjHGLhOA8