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Blanket Weed
Cladophora glomerata
Also known as Cladophora, Cladophora Algae Ball
Plantae›Chlorophyta›Ulvophyceae›Cladophorales›Cladophoraceae
📍 Worldwide in ponds, streams, and rivers
Dense, rough-textured mats of dark green filaments that blanket pond plants and surfaces. Common in outdoor ponds and highly nutrient-rich tanks. More coarse and branched than soft hair algae. Difficult to eradicate fully — physically remove as much as possible before treating with algaecide or reducing nutrients aggressively.
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Quick Facts
- role
- nuisance — ponds and high-nutrient tanks
- cause
- high phosphate, high light, warm temperatures
- control
- manual removal, reduce nutrients, UV steriliser in ponds
Water it likes
- ph
- 6.5–8.0
- hardness
- 5–20 dGH
- temperature
- 50–72°F (10–22°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Not legal advice, and possibly incomplete or out of date.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.