A little green goes a long way
Moss Balls
Build a living moss ball aquarium for your desk, shelf, or someone you love. Choose your moss ball count, glass vessel, and stone finish in one complete kit.
Meet your moss ball
Small world.
Plenty to discover.
A little green, made yours
Marimo moss balls are living freshwater algae, commonly called moss balls for their soft, rounded appearance. They live underwater rather than in potting soil.
Choose one, two, or three marimo, a Round, Tall, or Wide glass vessel, and light or dark stones. Every option belongs to one complete ModMoss terrarium, with the selected configuration and price shown before you add it to your bag.
Simple care for a living thing
Keep marimo in clean, cool water with indirect light, away from direct sun and heat. Refresh the water regularly and never release marimo or aquarium contents into natural waterways. See our care guide for the everyday basics.
Natural shapes and colors vary. Our images illustrate the available styles; exact proportions and vessel dimensions are not finalized yet.