Marimo Moss Balls

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-21%
Marimo Moss Ball 2–3 cm (1 in) Aegagropila linnaei
From 0.78 $From 0.62 $
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-17%
Aquarium Moss Ball – Marimo Ball 1–2 cm (0.4–0.8 in)
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-17% SOLD OUT
Marimo Moss Ball Aquarium – Aegagropila linnaei 3–4 cm (1.2–1.6 in)
From 19.98 $From 17.45 $
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-18% SOLD OUT
XXL Marimo Moss Balls 7-10 cm
From 26.38 $From 23.99 $
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Marimo Moss Balls for Aquarium 5–7 cm (2.0–2.8 in)
From 23.98 $From 22.07 $
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-25% SOLD OUT
Marimo Moss Ball – Aquarium Moss Ball 4–5 cm (1.6–2.0 in)
From 23.66 $From 20.01 $
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Marimo Moss Ball & Live Marimo Moss Balls Care

Welcome the enchanting underwater world into your living space with our authentic, sustainably cultivated marimo moss ball collection. Despite their colloquial name, genuine marimos are not true terrestrial live moss; they are a rare form of algae (Aegagropila linnaei, historically Cladophora). In shallow freshwater lakes, natural current motion gently rolls colonies along sandy beds, shaping each growing sphere into a velvety spherical shape. Cherished in Japanese culture as lucky charms, each living alga sphere makes a delightful, low maintenance moss ball pet for aquarists.

Every healthy marimo in our unique aquatic plant nursery is responsibly grown under strict bio-security standards. They provide safe decoration for any freshwater aquarium, fish tank, glass terrarium jar, or clear glass vase with a cork lid. Unlike delicate species, demanding aquarium moss, or fragile freshwater moss, each marimo ball is extraordinarily easy to care for and beginner friendly. Marimos photosynthesize under low light and indirect light, absorbing nitrate while improving overall water quality in clean water.

Buy Marimo Moss Balls for Freshwater Aquarium & Betta Fish Tanks

When you buy marimo moss balls from our specialized aquatic collection, you receive premium live moss balls suited for any fish tank:

Nano & Baby Marimo Spheres: Petite green spheres (1 to 2 cm / 0.5 to 0.8 in) scaled for nano shrimp bowls, a desktop jar, or a decorative moss ball container.
Medium Classic Balls: The standard size (3 to 5 cm / 1.2 to 2 in) for a freshwater aquarium, creating an organic grazing ground for ornamental dwarf shrimp.
Giant Specimen Balls: Majestic velvety texture spheres (6 to 8 cm / 2.5 to 3.2 in) forming an eye-catching centerpiece.
Marimo Moss Ball Kit & Betta Companions: Complete marimo moss ball kit displays, and ideal companions for a betta fish that love resting on soft surfaces without tearing delicate fins.

Aquarium Care Guide: Proper Care & Water Changes

Follow this simple plant care and marimo moss ball care guide: keep in cool dechlorinated tap water (15°C to 24°C / 59°F to 75°F) and perform regular water changes. Change the water every one to two weeks, keep away from direct sunlight so the algae does not turn brown, and gently roll the sphere during cleaning to maintain its round form. While you cannot propagate them from seed, colonies thrive for decades. Backed by our live arrival guarantee, each live aquarium moss ball ships across the United States within 10 to 30 business days with free delivery.

Frequently Asked Questions (FAQ)

Are your Marimo moss balls imported from Japan or responsibly cultivated?

While Marimo moss balls (Aegagropila linnaei) originate from lakes in Japan (like Lake Akan), wild harvesting is protected. Our marimo balls are sustainably propagated in controlled, pest-free European aquatic nurseries, ensuring optimal health and preventing environmental harm.

How long do live Marimo moss balls live in home aquariums?

With proper care and regular water changes, Marimo moss balls are among the longest-living aquatic organisms on Earth. Because growth is slow (~5 mm / 0.2 in per year), healthy marimos easily live for over 100 years as living family heirlooms.

Can Marimo moss balls live with betta fish and shrimp?

Yes, marimos are wonderful companions for betta fish and freshwater shrimp. Bettas rest on their velvety surfaces without risk of fin tears. Ornamental shrimp graze on microscopic biofilm, keeping the moss ball clean.

What water temperature and lighting conditions do Marimos require?

Marimos prefer cool water between 15°C and 24°C / 59°F and 75°F. They thrive under low light or moderate indirect room illumination. Avoid direct sunlight or hot water, which turns the alga filaments brown.

How do I maintain the spherical shape and clean the moss ball?

In natural lakes, gentle currents turn the balls constantly. In a still fish tank or vase, gently roll the marimo between your palms every couple of weeks during water changes, and give it a gentle squeeze in clean dechlorinated water to rinse out trapped organic debris.

Do Marimo moss balls need specialized substrate or fertilizer?

No specialized substrate, soil, or liquid plant fertilizers are needed. Marimo balls absorb ambient nutrients and nitrates directly from the water column through photosynthesis, thriving on plain bare-bottom glass or smooth aquarium gravel.

What are your shipping times and live arrival guarantee for the United States?

Our live marimo moss balls are securely packed in moisture-retaining, insulated aquatic shipping containers. We offer a 100% Live Arrival Guarantee across the United States. Orders arrive within 10 to 30 business days with complimentary insured shipping included.