Marimo Balls are actually a spherical algae form that grows into a round ball shape. The word Marimo in Japanese literally translates to "seaweed ball" and was coined by Japanese botanist Takiya Kawakami. This plant grows extremely slowly, at a rate of less than 5mm per year. Because its essentially a type of algae, Marimo Balls are extremely easy to care for and can grow in almost any aquarium condition.
Marimo Balls is extremely easy to plant. Literally throw it in your aquarium, or break it up into a mat and attach it to your rock or wood. It can be flatted out into a mat and glued or tied onto your stones to create a hilltop appearance. The possibilities with this plant are only limited by your imagination.