I had it grow okay submersed but it never thrived.
I had a few runners.
I had plenty emergent.
I also had plenty of stock to try out and add to the tanks, but I have not tried it with peat/flourite/mulm. I was using water column dosing only at the time with no iron etc in the substrate, just plain old sand.
Looks like I may want to try again.
Regards,
Tom Barr