I think this plant is Mexican Oak Leaf? (the green broad leafed stuff) I don't know. Whatever it is, it likes to float more than be planted. I'm having better success getting it to grow roots and then achoring a couple of them with a rock. It sheds leaves like crazy too and it's annoying. I'm considering just taking the whole mess out and replacing it with Temple Compacta if I can get my hands on some more. (I love that stuff!)
As I've already said, stuff just keeps melting on me in this tank. I've had, like, 20 of these oak leaf things melt on me already. It is a good thing they are cheap. $3.99 for a huge bundle (about 20) at my LFS.
Anyway, I am leaning more towards anubias, moneywort & java ferns to fill in space- they've done better for me. Temple compacta has also done super in Firework's tank, so I want to put a bunch of it in this one.
The vallisnera has also done super in this tank, but it just doesn't "fill" it enough for a sorority. The girls love swimming thru the leaves tho.
The moneywort is growing tall, but some of it did melt. (okay, quite a bit.) I am going to order a bunch more.