Yup that is ambulia. I got some with my yellow shrimp. As for lighting I have 2 CFL 40 watt plant bulbs that hang over all my planted tanks. My plant has not only doubled in size since I got it but is now shooting out new shoots. Maybe look into a "plant" light that works with your aquarium? I got mine at home depot and if they sell 48" I am pretty sure you should be able to find one that fits yours, they had smaller ones there as well. I do think it can be saved with better lighting. How long are your lights on? (sorry if I missed the answer) when I got my plants I was told 10 hrs, I leave mine on about that amount of time. I turn them on at 7am and off around 5:30.