hi, i have some staurogyne growing emersed but it has now shot up and it at the top of the container. so it will not get any taller. as i only have one stem, i would like to gain more, so is there anyway to trim it so i get another stem or generally how do you trim it so it will grow back. i put the other stem in my tank and that has gone bushier rather than taller. i prefer the bushier low lever version!! but i just need a bit of help. many thanks.