Don’t be fooled by its name! The Marimo Moss Balls aren’t moss at all. It’s actually a rare growth of algae that appears as a dark green spherical ball. Marimo directly translates to “seaweed ball” in Japanese, and though it only typically grows a small 5mm a year, it can actually live up to over a 100 years. 


Commonly found growing in shallow and sandy lakes, the Marimo Moss Balls are a great addition to your aquarium, especially if you already own aquatic animals. They can help to provide oxygen, prevent the growth of other algae, and are aesthetically pleasing as well.


Here are some pointers on how to care for the Marimo Moss Balls!

  • Change the water every 2 weeks with regular tap water
  • Roll them while cleaning to help maintain its shape
  • Indirect sunlight
  • Try to keep the temperature between 17-23 degrees