Vin's AGA presentation is great, I think it was Happi that provided the link to me (others may have also posted the lnik). But I had started off by reading Vin's original Rotala Kill Tank thread and yes, I have gone through every page
pity some of the photo links are no longer working. Rotala Kill Tank
Regarding the issue of stunting... i have stunted and unstunted stems in my tank at the same time, as well as wrinkled and unwrinkled Ammannia Golden. I can also occasionally stunt Wallichii
in my high tech tank through too much fiddling with the parameters while Wallichii
grows perfectly normal in my low tech with boring stable parameters 😅
My working thesis is that it is possible for plants to adapt (within a certain range) but sometimes its just luck (or complex interactions).
For example, Happi mentioned that Ammannias will stunt with the Tropica clone formula - but I believe that Tropica dosing is 'low enough' such that even if several stems stunt, there will be some stems that mysteriously do not. (The instagram link showed the user saying that he uses Tropica levels of dosing)