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Plant Freshwater Care: easy

Stringy Moss

Leptodictyum riparium
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Other names: Leptodictyum riparium
Group: Epiphytes and mosses · Family: Amblystegiaceae · Origin: Throughout the Northern Hemisphere — Europe, Asia and North America

A fast-growing moss with thin, long, thread-like shoots that also tolerates cool and hard water. Its shoots waving in the current give a natural look; without regular trimming it gets untidy.

Last updated October 16, 2026

Temperature
10–28°C
pH
6–8
Hardness
2–20 dGH
Light
Low
CO₂
Not needed
Growth
Medium
Placement
Attach to rock/wood
Height
Up to 10 cm

Water parameters

Temperature10–28°C
pH6–8
General hardness (GH)2–20 dGH
Recommended range

Overview

October 16, 2026 · Suggest an edit

Stringy moss is a common moss in the streams and ponds of the Northern Hemisphere. Its shoots are thin, long and thread-like; because its small leaves are sparsely arranged, it has a light, floaty look. Its shoots waving in the current suit natural-looking aquariums especially well. It grows faster than other ornamental mosses and survives even in cool, hard or nutrient-poor water.

Planting and Placement

October 16, 2026 · Suggest an edit

It is tied to stone or driftwood with cotton thread or fishing line. If not secured well enough, shoots can break off and float to the surface; check it during the first weeks.

Care and Fertilization

October 16, 2026 · Suggest an edit
  • Light: Low to medium.
  • CO₂: Not required.
  • Fertilizer: Fish waste is usually enough.
  • Because it lengthens quickly, trim it every 2–3 weeks and collect broken pieces from the aquarium; otherwise it spreads into the filter intake and among other plants. Cut pieces become new plants.

Propagation

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Common Problems

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Hobbyist notes

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Things you won't find in books, learned by trial and error. The most helpful ones are on top.

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Change history and contributors
  1. Page created · October 16, 2026