Plagiomnium cf. affine

Pearl Moss Plagiomnium cf. affine used as foreground moss carpet in aquascape

Plagiomnium cf. affine, commonly known as Pearl Moss, is a beautiful aquarium moss known for its dense, lush green cushions with small rounded leaves that resemble strings of pearls. Its growth form creates a soft, vibrant carpet effect, making it ideal for natural aquascapes and nano tanks.

Native to Europe and Asia, Pearl Moss grows upright to form cushions or mounds rather than creeping flat like other mosses. It can be attached to rocks, wood, or placed directly on substrate, where it develops into compact bushes that provide hiding spots for shrimp and fry.

It thrives under low to medium lighting and does not require CO₂ injection, though CO₂ and fertilisation promote faster growth and deeper green colours. Its slow to moderate growth rate makes it easy to maintain without frequent trimming.

Pearl Moss is perfect for foreground placement, moss walls, moss trees, or accenting hardscape features.

How tall does Pearl Moss grow?
It grows to 2-5 cm tall, forming dense cushion-like mounds.

Does Pearl Moss need CO₂?
CO₂ is not required but enhances growth speed and deeper green colouration.

Is Pearl Moss suitable for low-tech tanks?
Yes - it thrives in low to medium light without CO₂, perfect for beginner and shrimp tanks.

How do you propagate Pearl Moss?
Simply divide and reattach portions to new areas using thread or planting glue.

What makes Pearl Moss unique?
Its small rounded leaves create a pearl-like appearance, forming attractive dense cushions.