10pcs 1-2cm Marimo Moss Ball Cladophora Live Aquarium Plant Fish Tank Shrimp *FREE SHIPPING



People often mistake Marimo moss balls for little plants, but they are in fact animals! Moss balls are a type of algae that grow into unique, spherical shapes. They form colonies and can be found in lakes and rivers around the world. Marimo moss balls make great additions to any fish tank, and they're easy to care for too! Keep reading to learn more about these fascinating creatures. . . .

Marimo is a rare growth form of Aegagropila linnaei in which the algae grow into large green balls with a velvety appearance. The species can be found in a number of lakes and rivers in Japan and Northern Europe. Colonies of marimo balls are known to form in Japan and Iceland, but their population has been declining.


They are often used as ornamental decorations in aquariums and terrariums. In addition to their aesthetic appeal, Marimo Moss Balls also provide a number of benefits for the plants and animals living in their environment. For example, they help to oxygenate the water and remove excess nutrients that can lead to algae growth. Marimo Moss Balls are easy to care for and can live for many years with proper care.


Marimo Moss Balls are one of our very favorite plant discoveries of the last few years. Marimo are equal parts bizarre and beautiful, and Marimo moss ball care is very easy.



Marimo Moss Ball Care:



Keep your Marimo where they will receive llow to medium indirect light. You must protect marimo from the direct rays of the sun, as Marimo can easily turn brown if they are getting direct light! Also keep in mind that direct sun will be intensified by glass marimo enclosures which can heat water quite quickly. Remember - these guys are native to cool lakes, and should be kept cool.

Marimo are well adapted to low light spaces and can photosynthesize in normal household light. If your space has no window, keep marimo close to a fluorescent or full-spectrum bulb.

Changing the Water

Change water once every two weeks using regular tap water (for best results, allow water to sit out for 24 hours prior to changing the water). You’ll need to change the water more often in summer, as it will heat and evaporate more quickly. Clean your marimo enclosure with a brush if algae begins to grow on tank surface.


If your marimo turn brown, make sure they’re moved to a cooler location with less direct light. They may recover and turn green again on their own. If not, you may add a tiny amount of aquarium ocean salt.

Why are my Marimo Balls Floating?

More than likely, your Marimo balls have an air bubble trapped inside that is causing them to float! Gently squeeze your marimo balls to pop the air bubble. Generally, Marimo will sink to the bottom of their tank within 1-2 days of being added to an enclosure.

Can Marimo Survive Outside of Water?

Yes! Marimo moss balls can survive without water if kept in plastic or a closed jar for several days, as long as they aren’t allowed to fully dry out. Plastic bags are the easiest way to travel with Marimo moss.

Keeping Marimo Shape Round

In their natural habitats, the waves and currents of the lakes gently rotate and roll the Marimo balls along the floor of the lake.

To ensure that Marimo stay keep their round form and don’t flatten out, you’ll want to gently agitate the water in your Marimo enclosure, with the goal that when your Marimo balls settle back to the bottom, they rest on a different side than they had prior. Try to simulate the gentle waves of a lake.

Marimo and Aquarium Safety

Many people ask us if Marimo can go into their fish tanks. We’re happy to report that Marimo are welcome additions to freshwater aquariums. In fact, they naturally absorb toxic nitrates in water and act like miniature filters, cleaning the water.

Betta fish and tiger shrimp are great companion additions to marimo aquariums. Bettas and tiger shrimp both come in beautiful colors including almost every color of the rainbow. They also prefer fresh water environments.


Using Marimo Moss Balls in Your Tank Design:

If you're looking for a unique and low-maintenance addition to your aquarium, look no further than the marimo moss ball. These charming little balls of algae are not only visually appealing but also offer several benefits to your aquarium's ecosystem. And the good news is, they're readily available for purchase online or in-store. These vibrant little balls of algae are a unique addition to any aquarium and offer several benefits to your ecosystem. They help purify the water by absorbing excess nutrients and provide a natural habitat for beneficial bacteria. And the best part? Live moss balls have a longer lifespan than dried or dead ones, ensuring they'll thrive in your aquarium for years to come. So why wait? Enhance your aquarium today with live marimo moss balls!


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