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  1. So I recently purchased mass balls from my local PetSmart about 3 weeks ago and I changed the water last Thursday but the water is already turning into a dirty look.

    • I have tiny pebbles coming out of one of my moss balls… They do not look like zebra mussels. There is a film floating around… I’m afraid of putting them in my fish tank. What can I do about the pebbles?

  2. I received several moss balls for my daughter for Christmas-they have arrived and I do not know what to do with them. They were sent in a ziplock bag and there is moisture in it. Do I leave them in it or do they need to be put into water?

  3. Hey,
    I recently got a couple marimo moss balls, they have changed the colour of the water and I don’t know why, they look decently healthy considering the fact I got them of eBay but it is slightly concerning as I can’t find any information as to why this is happening or what I can do to stop the balls from changing the colour of the water. Thank you

    • Did you wash them out repeatedly? After 3, 10m sessions of soak and squeeze mine still had a little brown water leaking out, now they’re in quarantine before adding to my tank to avoid that problem.

  4. Hi,
    I have two large Marimo’s that are on the greyish side, one of those two looks more grey than the other. The rest of my Marimo’s in the tank look great, nice and green. Are they just dying..? I take the time to clean them. Any chance in saving them?

  5. Is there a way to treat a marimo that has turned brown from lack of water? I bought one of my marimos in a hurry because I saw that the store selling it did not place it in water, and it was turning brown. I put the brown marimo in a new tank with clean water just in case, and added some of the marimo food(?) that come with them. It supposedly includes nutrients like magnesium and calcium. On the first day I bought the brown marimo, it was floating instead of sinking to the bottom, and smelled of rotten eggs. After a day in water, the marimo sunk down, though its colors are still looking very bad. I am planning on trying the cleaning method as soon as I can, in case it helps the marimo. Are there any suggestions on what I can do to save this poor marimo?

    P.S. Though I am currently taking care of 3 marimos including the one I am talking about, I am still a very beginner on marimo caring, so please help!

    • I’d remove them and give them a good soak and rinse. Sulfur smell is not really a good sign. If the color doesn’t start to turn green and worsen you may need to trim the brown spots and re-roll the good part back into a ball. Or cut it in half if the smell and color doesn’t improve to see if it’s starting to rot on the inside.

  6. Thank you so much for theses tips!
    Unfortunately, my moss balls were standing in the direct sun for too long and without a change of water either.
    They show some discoloration so I moved them away from direct sunlight and changed the water.
    The balls themselves don’t fall apart, but all the stones in my aquarium show some light green algae growth. I keep nothing but the marimos in there.
    Is this already some kind of dissolution?

    • 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.

  7. 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?

    • Mine are too. I read that it means they’re getting too much light. Perhaps lower the light source amount and change the water? It’s also good to give your mossballs a bath in a little container and squeeze the water out of them. To add, the water should be 78°F or lower, so make sure that’s good too.

      • I have had a driftwood tree almost a year that i covered with moss balls. They are now very dark green and looking poorly What can I do to save them ?

    • Hey there, as this is a month late I hope it finds you well and I hope the problem was solved, but I would recommend pulling out the marrimo moss,Checking for And then dealing with discoloration as scripted above. I would then recommend propagating it, best way for moss in my opinion is cutting into two equal parts forming the ball with the half wrung out moss and tying two pieces of twine around vertically and horizontally to promote growth in the ball form. You can through them back in your aquarium,if there’s no discoloration your moss just is changing shapes and growing which is normal, the twine can still be used to keep a larger, healthy miss ball keep its shape. Hope to have helped or answered any unresolved queries!

  8. Hi! I have a question, I bought some Marimo online, they seem to be of the farm raised variety, so are these the same species of algae than naturally born Marimo? Or are they a different algae? Are there any difference in caring for the Marimo? thanks!

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