Stringy Moss – Leptodictyum Riparium
In aquaristics, the name Leptodictyum riparium (or Amblystegium riparium) is commonly used for the upright-growing “stringy moss”. However, populations of L. riparium native to Germany have a very different appearance even when kept under the same conditions. They form – if they are not kept under very low light – more or less horizontal shoots with dense, flat foliage. The growth habit of this moss corresponds to the descriptions of L. riparium in taxonomic literature (e.g. Frahm & Frey 1992) far better than that of the upright-growing “stringy moss”. We are of the opinion that the popular “stringy moss” is Drepanocladus aduncus, not L. riparium.
Streamside Leptodictyum moss, or Leptodictyum riparium, is distributed in alpine and riparian zones across Europe and Asia. It thrives in moderate to high light conditions and prefers stable, nutrient-poor substrates.
| Key Features | Details |
|---|---|
| Growth Habit | Horizontal, dense, flat foliage under moderate to high light |
| Light Requirement | Moderate to high light |
| Water Parameters | PH 6.0–7.5, GH 3–8 dGH |
| Substrate | Soft, nutrient-poor sand or gravel |
FAQ
What is the correct identification of stringy moss?
The moss commonly referred to as ‘stringy moss’ is actually Drepanocladus aduncus, not Leptodictyum riparium. True Leptodictyum riparium forms horizontal, dense foliage under moderate to high light, which differs from the upright growth typically associated with the popular ‘stringy moss’.
How should I care for Leptodictyum riparium in my aquarium?
Provide moderate to high light, stable water conditions with pH between 6.0 and 7.5, and use soft, nutrient-poor substrates like sand or gravel. Avoid over-fertilizing as this can lead to excessive growth or algae competition.
Does this moss require special water chemistry?
It prefers stable water parameters with a pH range of 6.0–7.5 and general hardness between 3–8 dGH. Regular water changes are recommended to maintain water quality.
Luke Abraham –
I bought this moss for my planted tank and it has grown well under moderate light. The foliage spreads out evenly and looks natural. It’s a good alternative to traditional stringy moss, and the flat growth adds depth to the background.
Michelle Gill –
The moss arrived healthy and has adapted quickly to my tank. I noticed it spreads horizontally, which is different from what I expected. It works well in a mid-to-backwater area and doesn’t compete with my plants for nutrients.
Ryan MacDonald –
After reading the description, I was cautious about buying this moss. It turned out to be a more accurate representation of Leptodictyum riparium. The growth is dense and flat, and it blends well with my existing plant setup.