Yeah it's Amazonia. Expensive, but it sure does work. That Blyxa is insane, it started with half a dozen healthy, but small, pieces and within a fortnight, Blyxa jungle. I swear it's the Amazonia, I've never been able to grow it in my community tank (that's just gravel & Dino dung (it was setup so long ago aquasoils didn't exist in Australia as far as I know).
If I can keep a few fry alive I think they'll definitely be good parents to future generations, from everything I've read rams are renowned for being poor parents due to too many years of farmed breeding & removing fry from their parents, not allowing the parents to pass on parenting skills to their offspring. If I can get a few well adjusted rams out there I'll feel a little but awesome.