Marimo Moss Ball

Aegagropila linnaei

A rare, spherical green algae ball that grows extremely slowly. Requires almost no maintenance — just occasional squeezing and turning. A fascinating living decoration.

Care Parameters

Light

Low

CO₂

None

Growth

Very Slow

Difficulty

Beginner

Placement

Foreground

Temperature

15–28°C

6–8

Propagation

Very slow; divide if ball becomes too large.

Suitable Equipment

Protein Skimmer

Hang-On-Back Filter

Canister Filter

Internal Filter

Common Problems

Hair Algae

Long green strands coat plants, hardscape and glass. Common in young or bright tanks.

algae

Staghorn Algae

Grey-green branching tufts shaped like antlers on plant tips and filter outlets.

algae

Black Beard Algae (BBA)

A stubborn, dark algae that grows in tufts on plants, decorations, and equipment. Often indicates fluctuating CO₂ levels. Removed by spot-treating with hydrogen peroxide.

algae