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Star Moss
Tortula ruralis
Plantae›Bryophyta›Bryopsida›Pottiales›Pottiaceae
Star Moss (Tortula ruralis) is a terrestrial moss species occasionally used in paludariums and riparian aquascaping, though it is not a true aquatic plant. It features fine, delicate branching with small leaves and a distinctive star-like appearance when viewed from above. This moss is extremely hardy and desiccation-tolerant but struggles when fully submerged for extended periods.
Where it's from
Native to Belgium, South Africa, Sweden and United States
At a glance
- CO₂
- not required
- Growth
- Slow
- Placement
- epiphyte
- Temp
- 50–68°F
- 10–20°C
- pH
- 6.0-8.0
- GH
- 36–179 ppm
- 2–10 dGH
Ammonia 0 ppm and nitrate under 20 ppm.
Compatible livestock
See all 4Non-destructive and will not damage moss; prefers cooler water compatible with Star Moss
Peaceful algae grazer that will not uproot or consume healthy moss
Gentle grazer that helps control algae without harming delicate moss structure
Prefers cool water (15-24°C) and will not uproot or consume moss
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Common diseases 4Submersion Melt, Algae Overgrowth, Desiccation Damage, Poor Growth / Stagnation
Submersion Melt
Moss turns brown or black, loses structural integrity, and disintegrates when fully submerged for extended periods
Use Star Moss in paludarium or emersed setup; keep above waterline or mist regularly instead of full submersion. Ensure high humidity (80%+) and good air circulation.
Algae Overgrowth
Green or brown algae coats moss surface, reducing light penetration and smothering delicate leaves
Reduce lighting duration to 6-8 hours daily; increase water flow; add algae-eating shrimp (Amano, Ghost) or snails; perform manual removal with soft brush
Desiccation Damage
Moss becomes brittle, pale, and loses color; leaves curl and crumble when touched
Increase humidity through regular misting (2-3 times daily); use a spray bottle or humidifier; ensure substrate or hardscape remains consistently moist but not waterlogged
Poor Growth / Stagnation
Minimal new growth, yellowing of older fronds, overall stunted appearance
Improve water circulation with gentle flow; ensure adequate indirect lighting; maintain cooler temperatures (10-18°C); consider liquid fertilizer supplementation in low-nutrient water
Legality
No state or federal restrictions on record.
Not legal advice, and possibly incomplete or out of date. Rules vary by state and change over time; check with your state wildlife or agriculture agency before buying, keeping or shipping it.
The care information here is written with AI help, so it can contain mistakes. Spot one? Tell us and we'll fix it. Native range: Bryophytes of Belgium (CC0); Dyntaxa. Svensk taxonomisk databas (CC0); Checklist of the Mosses (CC BY 4.0); South African National Species Checklist (Catalogue of Life in South Africa (CC BY 4.0).
At a glance
- CO₂
- not required
- Growth
- Slow
- Placement
- epiphyte
- Temp
- 50–68°F10–20°C
- pH
- 6.0-8.0
- GH
- 36–179 ppm2–10 dGH
Ammonia 0 ppm and nitrate under 20 ppm.
Keepers’ experiences
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