No photo yet
Sign in to submit the first photo
Thread Algae
Zygnema sp.
Plantae›Charophyta›Zygnematophyceae›Zygnematales›Zygnemataceae
📍 Worldwide in slow freshwater
Very fine, dark green threads — slightly stiffer than Spirogyra and less silky. Wraps tightly around plant stems and mosses. Caused by low CO₂ and high light. Siamese Algae Eaters are one of the few fish that readily consume it.
Community Photos
0 photosPhotos are added when members log a tank with this species and upload a photo in their tank journal. Add your own tank to contribute.
No photos yet — add a tank with Thread Algae to be the first!
Sign in to vote.
Tips from the community 💡
0 tipsReal experiences, care advice, and keeper notes. Finn learns from these too.
Sign in to share your experience.
No community tips yet — be the first to share your knowledge!
Quick Facts
- role
- nuisance
- cause
- low CO₂, high light, low flow
- control
- Siamese Algae Eater, raise CO₂, reduce photoperiod
Water it likes
- ph
- 6.5–7.5
- hardness
- 4–15 dGH
- temperature
- 59–77°F (15–25°C)
Legality
No state or federal restrictions on record for this species.
Not legal advice, and possibly incomplete or out of date. Rules vary by state and locality and change over time — always confirm the current regulations with your state wildlife or agriculture agency before buying, keeping, or shipping this species.