Shoal Grass is flat like Turtle Grass and also sends long runners through the substrate to send up a new plant. This grass can also reach heights of 12-18".  It makes a great transitional plant from reef to grass bed.  Established substrate should be 3" deep, and plants will require 8-10 hours of lighting/day.  Ghost shrimp will like to hide in it. You may purchase a cup or two of the substrate from which it grows in the wild.  We only sell in bunches as this grass has such a a fine leaf.   We have also had much experience     harvesting and keeping Shoal grass. Please contact us with any of your questions or comments.