After a week of watching the HC sit there, I got impatient and filled the tank--hopefully I don't regret it
I ended up putting blyxa in the back corner, along with some E. tenellus and rotala that I had kicking around. I wouldn't be surprised if this turns out to be too much, but it's easy to chop excess stems later if needed.
As you can see from the drop checker I'm running the CO2 pretty high for the moment, hopefully that helps the HC adapt. I'm not sure if there's any disadvantage to running the gas this high as long as there are no creatures in the tank, please chime in if you have any thoughts.
I was pleasantly surprised at the lack of dust from the netlea soil, this photo was taken about an hour after filling. A real departure from the weeks of silt you get after filling a fluorite tank.