How to Treat a Sick Marimo Moss Ball

How to Treat a Sick Marimo Moss Ball

Although Marimo balls can withstand a range of temperatures and water conditions, color changes may indicate that something is wrong. Below are signs to look for, and what you can do.

White Marimo or Color Loss:

If your Marimo is turning white or loses its lush green coloring, it’s probably receiving too much sunlight. If it also seems a bit slimy or develops an unusual texture, it may have a hostile algae growing around it. Carefully wash the hostile algae off or remove it with tweezers. Another method is to use an old toothbrush to gently scrape off the malignant algae.

Brown Marimo: 

If your Marimo is turning brown, it’s time to clean it. If this doesn’t work, carefully pick off the brown (dead) parts and add a bit of salt to the water to stimulate the Marimo’s growth. If the bottom of the Marimo has turned brown, roll it around more often to ensure all areas receive sufficient sunlight.

Disintegrating Marimo:

If your Marimo is turning black or falling apart, it may be decaying from the inside out. This can occur when it has been covered by hostile algae for a while or when it’s too big for clean water to reach the inside. Remove the black parts and gently re-roll the Marimo.

By following these simple guidelines, your Marimo will thrive for years to come.

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Comments (6)

  • Raine Kasie Taris Reply

    Need help.. Why my marimo ball falling apart i try to resharp it back.. Became to small pieces

    June 23, 2019 at 1:39 pm
  • Jackie A Reply

    Why is the water of my moss balls turning yellow/brown? Is the normal?

    June 18, 2020 at 10:18 pm
    • Caorl Reply

      You prolly need to clean it just remove the moss balls and porbly just get rid of the container put them in something different and clean your Missy’s well

      November 30, 2020 at 9:11 pm
  • Help Reply

    My moss balls are all losing colors, (I have eight) and my dad thinks they’re dead. They’re a dull green and bits of brown and white. Are they gone? How to save?

    June 30, 2020 at 2:32 pm
  • Mollie Anderson Reply

    Why does mine smell like eggs . It’s super gross.

    July 1, 2020 at 10:31 am
    • Icarus Reply

      Same thing happened here, except mine was in that condition when I bought it from a store that kept the marimo out of water for multiple days. I am currently trying all the things I can to treat it, I believe giving it clean(perhaps a bit cool, as in a very little bit cold) water is helping.

      October 31, 2020 at 1:01 pm

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