Morning, Another sad update; the platy who looked a little wobbly has passed away. No sign of white fungus or anything though, no other signs. Doing a big water change and gravel vac today. Think we are doing all we can do, but again if anyone has any thoughts to share...?
I think you've done all you can. I might be inclined to run a second standard course of eSHa 2000 after today's water change as a preventative in case there are ant bacteria still lurking. Hopefully as the remaining fish look uninfected, this will be the end of it. FX.