I guess I just have the perfect water quality’s? I don’t know for sure. That’s so true about experimenting. I bet I killed 3 pounds (not actually) of Anacharis before I got the lighting down! 

Yes there are roots. It is hard to see because they are in the back. The roots can be any color from green to pale white.Looks beautiful and really provides a nice flowing look to your tank. I didn't see any roots, are there any roots sprouting out from the stems?