Thank you both for your responses! 🙂. You've given me lots to think about.
The truth of the matter is that I've tinkered with this tank probably too much this past week. I've mega-dosed some excel to combat minor bba, changed my dosing parameters so much that I'm not sure I remember exactly what levels of what nutrient I dosed this week, added a bunch of new plants, etc.. Long story short, I haven't been consistent. Not good.
I put this plant in the tank about a month ago and it has flourished until this past week. It had actually been probably my best grower until I saw this necrosis yesterday. I must have been doing something right until just recently.
Having said all of that, I'm going to stop changing things so often and perhaps try one thing at a time. I plan to look into using some RO water once I let things normalize for a week or two, as well as learning more about micro dosing. I'll be interested in following your thread and seeing your results re: Vin Kutty.
Thanks again! 😄