Cladophora aegagropila, also known as Marimo Balls and Moss Balls; are soft, velvet-like, green algae balls are native to Japan and Northern Europe. In their native environment, due to photosynthesis, Moss Balls have been reported to surface during the day and sink in the evening. They make an interesting and unique addition to any aquarium.
Moss Balls were originally thought to be very slow growers, but recent study and experimentation proves that the growth can be greatly accelerated with regular dosing of liquid nutrients and high lighting. For optimal conditions, Moss Balls require moderate to high light intensity of at least 3 watts per gallon from full spectrum (5000-7000K) bulbs, as well as regular dosing of liquid nutrients. CO2 can also increase the growth and vigor of Moss Balls.
Moss Balls are propagated by division. Simply divide it into smaller pieces and they will also become spherical over time.