Marimo Moss Ball

Marimo moss ball care

  1. AmazonPassion
    Author: @AmazonPassion

    Common Name: Marimo Moss Ball
    Latin Name: Aegagropila linnaei
    Sold as: Circular Moss Balls
    Tank Placement: Foreground
    Max Size: 8-12 inches
    Temperature: 60-86 degrees
    pH: 6.0-8.5
    Growth Rate: Extremely Slow
    Propagation: Division
    Lighting: Any
    Supplements: Not necessary
    Difficulty: Easy
    Good for Beginner: Yes

    When I first got them over 12 years ago, I used to take these marimo moss balls out of the aquarium once a month for 24 hours and place them in a container (bucket) and dose with fertilizers for the Marimos to absorb the nutrients.

    Now, I just do monthly maintenance, squeeze the water and let the marimo float in my tank. This is my way to simulate their natural environment by letting them rotate so all the sides receive light. If neglected on the bottom of the tank, the part of the Marimo that sits on substrate will turn brown due to lack of lighting.

    Some No-Nos based on my experience:
    1. They don't do well with bleach and hydrogen peroxide dips
    2. Placing them in direct intense (summer) sunlight in small containers will burn them if kept there to long.
    3. They are known to carry hitchhikers so I would QT new ones especially if they were grown in ponds.

    RiverPaddler likes this.

Recent Reviews

  1. FishCareGuide
    Nice short caresheet. Really doesn't need much more since they're so easy to keep.
  2. JtheFishMan
    Great Article! Short and Concise. This article actually helped me with my Marimo Ball Placement!
  3. Animus
    The information is clear and concise. I have a few in all of my tanks but as other readers / posters have stated, I hadn't given them much thought. This write up just made the plant much more interesting to me. Kudos!
  4. Betta Great Granny
    Betta Great Granny
    I have 3 large in my 5.5 gallon tank and never thought about this. I just finished doing a water change in my tank and I did just that without realizing why. I just thought they looked dirty and a little brown, but now that I know I will do it often. Thanks for the advice!
  5. Oceangirl
  6. Grumpydinosaur
    These act like a natural filter as well but do that best in smaller tanks. Fin fact: Largest moss ball on record was 200 years old and 37 inches in diameter.
  7. JRS
    Good to know. Thanks