My fish grew another big blob today but it fell off while I was pouring myself a bourbon. He reaches the end of his prescription tomorrow at noon, by which time I suspect the fungus will not have been rooted out. I don't know at what rate the medication degrades in the water, which is problematic for further treatment.
*the medication, marketed as an antifungal, is actually an antiseptic, and can be stored in an amber glass bottle mixed with water. So I do the 25% water change tomorrow and hopefully Guppy is healing and once that happens over the fungus will not regrow in that spot.
13 hours ago