Description

Marimo Moss Ball Plant (Cladophora aegagrophila)
Overview
The Marimo Moss Ball (Cladophora aegagrophila) is a unique and decorative freshwater plant known for its soft, velvety green spherical shape. It slowly grows over time into perfect round balls, making it a popular addition to aquariums for natural decoration, algae control, and enrichment for fish and shrimp.
Origin
Native to freshwater lakes in Japan, Iceland, and Northern Europe.
Lighting & Placement

Light: Low to medium (indirect light preferred)

Placement: Foreground or as free-floating decoration

Growth Habit: Slowly grows in a spherical shape; roll occasionally to maintain form

Feeding

Absorbs nutrients directly from water

Requires no substrate or fertilizers

Benefits from occasional gentle rolling to maintain shape

Tank Mates
Safe for all peaceful freshwater species:

Small fish, tetras, guppies

Shrimp and snails

Corydoras and other bottom dwellers
Provides grazing surfaces and enrichment for aquatic pets.

Aggression
Non-aggressive; completely peaceful.
Experience Level
Beginner-friendly; extremely low-maintenance.
Water Parameters

Temperature: 68–77°F (20–25°C)

pH: 6.0–8.0

Hardness: Soft to moderately hard

Notes: Gently squeeze and roll occasionally to prevent debris buildup and maintain round shape.

The Marimo Moss Ball (Cladophora aegagrophila) is a charming and functional aquarium plant that adds texture, novelty, and natural beauty to freshwater aquascapes.