It is a interesting topic for sure. Yes I would have to agree with you on metronidazole was a real game changer when introduced to the hobby. I am a firm believer that if fed to the fish it will keep a lot of things at bay. Including Ich. It is interesting this article showed up because I have been thinking about this subject. In general I have been thinking about the information available and options. Currently, I am delving into Quarantining systems. There are many approaches and many are old school. I think we can do better and document things better. Sadly, the aquarium book market is pretty much all but gone. I have not seen a good book released in years. So thank you for taking the time to do this write up.