The only plant I've been able to grow successfully is pothos. It is not aquatic, so the roots can be submerged, but the leaves need to be above the water. (I put it through the hole in the lid.) It's easy to grow. It isn't picky about lighting and will even grow in plain water, so no extra nutrients are needed. The roots grow quickly, and the fish seem to like swimming through them.
If you want to stick with aquatic plants though, what type of lighting do you have? And how are you planting them (substrate, etc)
Last edited by LittleBlueFishlets; 04-08-2013 at 11:09 PM.