Marimo Moss Balls for Sale perfect for Guppy fish aquariums

Marimo Moss Balls

Marimo Moss Balls the most popular plants for tropical fish

Marimo Moss Balls are the perfect plant for your guppy aquarium. Aegagropila linnaei, known as Marimo a species of filamentous green algae found in a number of lakes in the northern hemisphere. These plants grow into large green balls with a velvety appearance. Colonies of such balls are only known to form in Iceland, Scotland, Japan and Estonia.

These Moss Balls are most popular with Guppy fish keepers and Betta fish keepers for a number of reasons but in particular they look gorgeous, exotic and interesting. More importantly these plants generate oxygen and remove nitrates thereby improving water quality. Basically these live plants are a natural biological filter which also removes ammonia in the aquarium.

Marimo grow in tap water at room temperature as long as the water is changed every one or two weeks (more frequently in summer and less often in winter) which makes them extremely easy to take care of. Hobbyists cut moss balls into smaller pieces knowing that the individual pieces will grow into separate Marimo Moss Balls and these plants do not cause algae problem. Moss balls have low light requirements and do not require CO2 which makes them highly attractive for aquarists who want plants that require minimal maintenance.

These plants are so robust they can survive up to 30 days in the mail and are shipping typically in small Ziploc bags with slight moisture. After you received the Marimo, some of them might be slightly out of shape. Place them into a bottle of clean water and gently roll and squeeze them. Marimo Moss Balls are known to have long life spans and you can find 2 to 3 inches balls that are easily 8-15 years old.

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This listing is for 3 Giant Marimo Moss Balls. These are one of the most popular plants in the aquarium hobby, and they are widely kept as ornamental plants in jars in Japan. The moss balls generate oxygen and remove nitrates, improving water quality. This is definitely something different for your aquarium that you don't see often! If you wish, you can cut the moss balls into smaller pieces and the individual pieces will grow into separate moss balls. Marimo balls are regarded as good luck charms in Japan, and since they have been known to live to 200 years and beyond, they are often kept as family heirlooms. They are thought to symbolize close bonds between family members or close-knit friends, and are often passed down to children and grandchildren or nieces and nephews. By the time future generations receive the marimo balls, they will be larger in size and will continue to grow with each generation. Additionally, marimo balls are sometimes given to young children as "pets," since the only care they require is occasional water changes. Marimo balls are also though to represent everlasting love; thus, they are often used as wedding table ornaments or even gifted at weddings. They are appropriate as a gift to the bride and groom, and smaller marimo balls make wonderful take-home gifts for the guests that will serve as mementos of the newly-weds' special day.


- All Aquatic Arts (formerly InvertObsession) brand plants and animals come with a 100% live arrival guarantee, plus free phone/text/email support directly from the owner!
- Don't be fooled into buying Marimo that has no listed size or is called "Nano" Marimo; these large Marimo Balls are 7-10x as large! You could take ONE of these and create 10+ Nano Marimo Balls.
- Does not need special or high intensity lighting, and can be kept in any freshwater aquarium.
- The moss grows slowly, so these moss balls are 8 to 15 years old!
- Extremely dense moss - bright green and healthy.

Benefits of keeping Marimo Moss Balls with Guppy Fish

- Great for small tanks (such as guppy and betta tanks) for providing oxygen and clean water to fish.
- Does not need special or high intensity lighting, and can be kept in any freshwater aquarium.
- The moss grows slowly, so these moss balls are easily over 5 years old!
- Extremely dense moss - bright green and healthy.
- Absolutely gorgeous and exotic looking plants for the aquarium

Scientific and common names for Marimo Moss Balls

Marimo ball
Aegagropila linnaei
Ball seaweed
Cladophera ball
Moss ball
Lake ball

Marimo moss ball and guppies
Betta fish plants for sale
photo credit: Vincent Lim Show Chen


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