The Red and Green medium Silk Plant twin pack contains two different plants (dark Red Leaf and Green and Red Leaf) allowing you to design a lush underwater world in your aquarium. The Ceramic weighted ball will disappear into the ceramic media allowing you to create a wonderful aquarium aquascape in minutes. Medium Silk Plants The plants in the biOrb Silk Collection have the vivid colours and detailed structure of real plants, bringing the beauty of the world's underwater world to alluring life in your biOrb aquarium. Simply drop the plants into the aquarium and they will self-right, ensuring they are in the correct orientation. The Silk plants will remain in place with their lush silky leaves Gently moving to the natural flow of your biOrb aquarium.