Mine (and my Red Cabomba for that matter) is very "leggy" i.e. long stems
with big gaps between the fern bits. All my plants grow like mad anyway but
I am beginning to wonder if in fact I've got my lighting a bit wrong. I am
wondering if there is not quite enough of it which is why the plants are
stretching upwards towards what light there is.

I doubt that's the problem. "Leggy" Cabomba (long internode length) is a
common, even in high light tanks. In fact, IME, it's more common in high
lighting. It grows a lot bushier in my moderate-light, non-injected tank than
in my high-light tank, I think because it grows slower.

One thing that can help is to never "top" Cabomba. Don't just chop the tops
off when you prune. Instead, pull out bottoms and re-plant the tops. That
helps a lot in keeping it bushy.



Leigh

http://www.fortunecity.com/lavender/halloween/881/