Why Is My Marimo Ball Not Very Green?

Why is my marimo moss ball floating? Aquarium Genie The best for
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What is a Marimo Ball?

A Marimo ball is a type of algae found in lakes in Japan, Iceland, and Scotland. It has a round, fuzzy shape, and it’s green in color. It’s a popular type of aquarium decoration, especially in the Japanese culture, and is even said to bring good luck. Marimo balls have become more popular in recent years due to their unique appearance, low maintenance, and ease of care.

Why is My Marimo Not Very Green?

If your Marimo ball isn’t as vibrant of a green as it once was, it may be due to a few different factors. The most common cause is too much light. Marimo balls need bright, indirect light to stay healthy, but too much light can cause the green color to fade. Another common factor is not enough nutrients. Without enough food, the algae will start to break down and the color will fade.

How to Make My Marimo Ball Greener?

Fortunately, there are a few simple steps you can take to make your Marimo ball greener. The first is to reduce the amount of light it receives. Try to keep the Marimo out of direct sunlight and keep it away from bright, artificial lights. You should also make sure your Marimo is getting enough nutrients. You can do this by adding a small amount of aquarium fertilizer to the water every few weeks.

Maintenance Tips for Marimo Balls

The best way to keep your Marimo ball healthy and green is to practice regular maintenance. Make sure to keep the aquarium clean by changing the water every month or so. You should also check that the water temperature is between 65 and 75 degrees Fahrenheit. Finally, you should also gently roll the Marimo ball every couple of weeks to help keep it round and its color vibrant.


Marimo balls are a beautiful and low-maintenance addition to any aquarium. However, without proper care, their color can quickly fade. To prevent this from happening, make sure to keep your Marimo ball out of direct sunlight and away from bright lights. Give it enough nutrients and keep the aquarium clean. Finally, roll it gently every few weeks to keep it round and its color vibrant. With these simple steps, your Marimo ball will stay green and healthy for years to come.

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