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Fuzz Algae
Stigeoclonium sp.
Plantae›Chlorophyta›Chlorophyceae›Chaetophoraceae
📍 Worldwide in freshwater aquariums
Short, fuzzy green tufts — typically 2–5 mm — that appear on the edges of plant leaves, hardscape, and equipment. One of the most common algae in newly planted tanks. Easily grazed by Amano shrimp, Otocinclus, and nerite snails. Caused by light excess or inconsistent CO₂ early in a tank's life. Usually resolves as the tank matures.
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Quick Facts
- role
- nuisance — common in new tanks
- cause
- excess light, cycling tank, CO₂ instability
- control
- Amano shrimp, Otocinclus, nerites, reduce photoperiod