3 Giant Living Marimo Moss Balls (~2 Inches) + 1 Nano Marimo Free! Live Cladophora Aquarium Aquatic Plant for Fish or Shrimp Tank, 8-15 years old Diameter is 2-3 Inches for Giant Marimo Moss Ball + Free Nano Balls Slow Growing Moss that does NOT cause Algae Problem. Atleast 8-15 Years Old! Ancient Japanese Good Luck Marimo. Just Change Water Once a Week! Dark, Lively Green Marimos that are Clean & Healthy! Can be cut into Smaller Pieces 100% Live Arrival Guarentee sold execlusively by Vanilla Bean Kings