Indeed goldfish, it does look great!
I'd second what Byron said regarding the rhizome. If you like the 'planted' look, you can actually just superglue it to a bit of slate, and it can merely rest on the substrate no problem. I've even done this and 'swished' a bit of sand over the slate, and it appears to be 'rooted' to the untrained eye.
The key for the rhizome is that it needs a bit of flow around it. Other than that, they are extremely hardy, low light plants. Even as little as ambient room light is enough to keep them alive (although they won't really grow at all with that level of lighting).