In case you use C. wendtii (those commonly available in LFS),
I have C. wendtii (the variant that is commonly available in LFS unless I ID wrongly) in my jar tank. If you use the same variant of C. wendtii in your nano tank (which is about the same scale as my jar tank), you can expect not to get the effect of "almost lies flat in a large open space" kind of , even if your lights are strong (my gut feel, could be wrong). This is especially possible because of the scale of the tank compared to that of the plant.
Of course, C. Wendtii 'tropica' might behave differently from the other variants.I have not sufficient experience to comment on that.
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