I'd be really happy to give some away.. but I live in Australia, and shipping plants OS might be difficult (or illegal?).
It is a pretty slow-growing plant, until it gets to the stage where it's sprouting baby leaves off the old ones. After that, it seems to speed up quite a lot.
I found it goes absolutely stupid with growth in my NPT (which has higher light than it prefers in my other tanks, too), just tied to a rock. It doubled in size in just a couple of months, to the point where I just had to take it all out so that the other plants weren't missing out on light.
The NPT produces a little natural carbon, and a bit of tannins from the organic potting mix (and now some wood I just included), so I'm wondering whether this is what caused it to have such rapid/healthy growth.