In my signature thread I have a patch of Belem growing in MGOPS, which is the same thing as MGOCPM minus the Peat Moss and Chicken poop.
I got a tiny bunch of it and spread it out, and I've seen doubled growth since I put it in there two weeks ago. It's slowly filling in the gaps and I expect to have a full carpet in by the end of November.
It will grow fine in your tank, as it's a heavy root feeder. Make sure not to crush the roots or plant it too deeply or the blades will rot.