Join Date: Sep 2011
Location: Mesa, Arizona, USA, Earth
+1 on the H. polysperma, although mine sometimes tends to grow so fast it can be more stem than leaves. And sometimes, not. I think it has a mind of it's own. Another great filler for me is Rotala rotundifolia. It grows a couple inches a week and if I don't trim weekly it will fill the tank. One tip on this plant is that it sends up a lot of shoots from the bottom, and if you don't thin them out occasionally it will tend to drop all the leaves from the lower half of the stems as it crowds out its own light. I think this is a common issue with stem plants, but you have to watch it as this grows so fast.