Glad to see more people getting this tank! How do you like the milwake regulator? Is the needle valve pretty stable?
It will grow like most carpet plants, spread out along the substrate via runners.Cool idea, that elatine triandra looks nice. My Rotala is growing really low and bushy in the front, and this looks similar but even lower. I read a little about it, and it looks like it's a stem, but will also spread? Do you just let it spread, or do you replant the trimming like a stem plant?
BTW, nice tank! looks like a similar basic driftwood structure as mine. One problem I am having is that BBA seems to love the upper bare branches that are exposed to lots of light . . . I am still working on the CO2 levels, which might help.