Solenostoma tetragonum (Pearl Moss)

10 November 2026

Solenostoma tetragonum is a small aquatic liverwort sold in the aquarium trade as Pearl Moss. The supplied product identification is consistent with the finely branched, bright green growth shown, although a definitive species determination cannot be made from product images alone. It is best used as an attached epiphyte on wood or stone, where its delicate texture provides detail without dominating the layout.

Identification

The supplied label identifies this plant as Solenostoma tetragonum ‘Pearl Moss’. It forms bright green, finely divided, somewhat curled or undulating strands. Because aquarium liverworts can resemble one another and the images do not show diagnostic microscopic features, the identification should be treated as a conservative trade identification rather than a confirmed herbarium-level determination.

Placement

Attach small portions to rock, driftwood, or other hardscape with fine thread or aquarium-safe adhesive. Do not bury it in substrate. Use it in the foreground or on shaded hardscape where its fine texture can be seen and water movement can reach the growth.

Cultivation

Provide stable, clean water, moderate lighting, gentle circulation, and a consistent supply of carbon dioxide when available. It can grow without injected carbon dioxide, but growth is generally less vigorous. Avoid excessive light combined with poor circulation, since this encourages algae on the delicate tissue.

Maintenance

Trim overgrown or loosely attached sections with clean scissors and remove detached fragments before they collect debris. Keep the mat relatively thin so light and flow reach the lower portions. Regular water changes and balanced fertilisation help maintain healthy green growth.

Propagation

Propagation is normally by division. Separate a healthy portion into small pieces and secure each piece to hardscape. New growth can attach over time, but attachment may be slow and loose fragments can be carried into filter intakes or unwanted areas.

Plant info

Colors: Green, Light green
Difficulty: Medium
Usage: On rock or root
Type: Liverwort
Growth rate: Slow
Height: 2–6 cm
Light demand: Medium
CO2: Medium

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