I'd say one or the other just so you don't get trimmings mixed up if you ever sell them and what not. Personally thats what I would do since I don't see a reason to use both if they look so similar
Great suggestion Jeff. I think their colors might be the same at the top but as far as a stem/leaf shape goes, there should be obvious differences right? In the event that I get both (if I could find anyone to sell any on here, lol) then I would put them in "designated" areas and if they grow out of their zone then I'll do a trim and RAOK it or sell it for cheap just to keep things in order
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I've grown both of them and like wallichii better. The nodes are more compact, but that was with co2 and high light. I also liked the color better, more of an orange than pinkish for the vietnam. I guess in a non co2 enviroment, like most rotalas, growth wont be as compact and just stay on the greener side.