Ok.... Its a 20 gallon, with about 2 inches of very small natural gravel, and the light is a florescent one that came with the tank. Its about a year old now. I wasnt sure if it was a lighting problem or fish or something. The leaves are green but they are very thin and look like mesh. And yes its the tank with the bushynose. If its lights, what do you suggest I replace it with? Oh I use a weekly liquid fertilizer called Leaf Zone.