Thanks for the replies guys
SnakeIce - I don't actually
want pondweed, I was hoping it was something else - I walked into the shop on a whim and saw this little plant; I thought it was (or rather, had the potential to be) pretty and would look nice in my tank. I'm fairly new to plants and while I can recognize many on sight, this one wasn't something I'd seen before. The guy knew it was in lousy shape, he gave it to me for almost nothing because he was certain it would die. I thought for $2 I'd give it a shot, and it seems to be working out
In the store it had very small (1/4" or so) leaves that were a plain green, and now it's producing 1/2" leaves that are light green and pinkish - a very attractive colour that contrasts well with the other plants. The picture isn't very good, I was hoping it would be sufficient for someone to recognize the shape more than the colour.
Aquabum - I've got 110W 9325K CF and 60W 6500K T12 fluorescent lighting on the tank (65g). It's not exactly high light, but so far everything including the new plants are doing really well.
[edit] I did some searching online, and it's almost certainly
Rotala rotundifolia (indica). It's not in my plant encyclopedia, thanks for helping me ID it! [/edit]