Assorted sizes of moss balls for aquarium (2.4-2.6cm, 3-3.3cm, 3.7-4cm) allow flexible placement, creating layered, dynamic underwater landscapes. Live Marimo Moss Balls are compatible with small fish and shrimp species, supporting a balanced aquatic micro-ecosystem in your aquarium. Live Marimo Moss Balls in indirect light and partial water changes, making them a low-maintenance for both beginner and experienced aquarists. As low-light aquarium moss, Live Marimo Moss Balls require no soil planting-simply place them in clean water to with minimal care. Live Marimo Moss Balls feature a soft, fluffy green spherical shape, adding a natural, serene aesthetic to any fish tank or closed terrarium setup.