I have been trying to grow this for a year - there is a chance the plant I have is A. Sessilis, which is supposedly not an aquatic plant. A month ago I bought a pack from Petsmart and its starting to grow, but slowly. I have been bringing my nitrates down from 40 to somewhere between 5 and 10, trying to replicate Kekon's experiment where he got much better growth with low nitrates and low KH which I have (2). I have read a lot on this plant, and I believe it likes steady conditions and lots of CO2. I have a lot of CO2 (over 30 ppm) blowing right on the plant and growth is still very slow. It may be easily outcompeted for CO2, so I may try turning off some lights to slow everything down (including some hair algae I get on lower leaves). I've seen evidence of this plant growing OK in lower light so turning some bulbs off shouldn't hurt it. First I'll see if steady, lower nitrates help out at all.