Hypnotic, I would like to respond but I can barely tell what you said.
Disregard my comment on the light distance to substrate, keep in mind the distance change could be just enough to go from medium to high light - not a problem IMO. The main thing here I am trying to ask you all is if anyone knows about the spreading of roots in semi-aquatic plants.
In many plants that live above water only, the roots spread at night, and I would imagine if a plant has adequate co2 supply from the air and plenty of light, but a longer dark period, it could spread more roots.
Any way, I am testing this in a small bowl with a 26 watt CFL 6500k bulb 5 inches from the substrate. I give it light from 12-6 and then it goes in my closet for a 16 hour dark period.
The temperature in the bowl is fine, I mist cool water and then re cover it with saran wrap.
Its growing in Aquasoil Amazonia.
I'll report back on how it goes.. but i'm so impatient.