That's dwarf hair grass and that needs high light, co2, and lots of ferts to grow. I think dwarf sag is your best option.
Oh, darn :/ I'd seen DWG before and it was by far my favorite, but I've heard before too that the need high light and CO2. I think I'd be able to make a DIY CO2 system, but for lights I can't find a higher wattage bulb for my standard fixture. I'll definitely look into dwarf sag. I haven't seen it in stores so I think I'll have to get it online. I was thinking LiveAquaria.com would be a good place to order it.