Anachraris is a fast growing grass that will multiply rapidly. Vallisneria, commonly called Eel Grass, is a tall, thin plant with ribbon-like strands than move gracefully in the water. Sagittaria is a good specimen plant and also a rapid grower.Plant these grasses in 1 or 2 gallon pots. Plant them in the container's center making sure that the bunches are firmly planted 1/3 into the soil. Use 2 bunches per container.