Lush looking grass style plants arranged on a solid ring which slides easily over the biorb bubble tuber simply drop the grass ring over the bubble tube for instant interestr the grass rings were created to allow you to personalise your reef one aquarium it is made from materials that are totally safe for aquatic life designed as a single ornament to cover the centre bubble tube and pre fitted with green synthetic plantsr three sizes are available a small version for the baby biorb a medi