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Lyngbya
Lyngbya sp.
Family: Oscillatoriaceae
📍 Worldwide in warm freshwater and brackish water
Dark, wiry filaments of cyanobacteria that form dense mats — often mistaken for BBA. Unlike true algae, it can fix atmospheric nitrogen, meaning low nitrogen levels do not suppress it. Produces toxins harmful to invertebrates. Requires the same treatment as blue-green algae: blackout, H₂O₂ treatment, and improved flow.
Keeping this species
- role
- nuisance — toxic
- cause
- warm temperatures, stagnant water, excess organics
- control
- 3-day blackout, H₂O₂ spot-treatment, erythromycin in severe cases
- warning
- produces toxins — harmful to fish and invertebrates at high levels
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Natural Habitat Temperature
72°F — 84°F seasonal range · (Jan low, Jul high)