A low light plant would probably be best. Uhm.. I dunno what the names of any are though lol. I'm sure you could ask in the plant section and then look up the names they give you to see if you'd like something like whatever they suggest.
Sword plants are also good. They're pretty tough plants and grow fairly well and fast.
Anubias plants are pretty good too. You're supposed to tie them to a piece of wood instead of burying their roots. It grows pretty slow though.
All of my bettas seem to love cambomba. It's a bit messy (when the leaves come off) and I think needs pretty good lighting though.
Here are some pics of the plants in my 2 betta tanks... I have no idea what the names of most of them are
heh
This one is of a sword plant in my 3 gallon. There's also 2 stalks of cambomba floating on the surface. You can't see it, but there's also a tiny anubias tied to a decoration.
Now I'm pretty sure these are plants that don't need great lighting.... at least that's what the fish store guy said lol. They're really nice though and really pretty. Hard as heck to get their dern roots buried though!
The one behind the frilly one up front. This plant has reddish coloring to it's leaves. Really nice contrast to all the green.
And another. The leaves are green, but the stems have a really nice looking red color to them.
And a pic of the anubias. It's the one with the big leaves in the background. It's still in the pot it came in.. mainly b/c I'm lazy and didn't feel like tieing it down to anything
And a pic of the cambomba. I really like this plant. It's pretty, grows fast and my bettas love it. They always like squeezing their way through the frilly leaves. We used to have purple cambomba (it had a pretty purple hue to some of the leaves) but it all ended up dying for some reason *shrugs*
