I have been researching with no success on how to properly prune Vallisneria spiralis. I bought a plant package and it has been growing very well. My Vallisneria has gotten out of control. I have C02 with ph meter and lighting of about 2.25 watts per gallon. How exactly do you prune this plant..Can you cut it half way down stem and replant. I am hoping to get it thicker as opposed to taller. If you do cut it half way down can you replant the stems that were cut or transfer them to another aquarium. Thanks..I am planning a planted Discus Tank and also would like to know the best plant for cover over substrate. My substrate is mixed..Small gravel and some plant substrate.