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Water Net Algae
Hydrodictyon reticulatum
Family: Hydrodictyaceae
📍 Worldwide in nutrient-rich ponds and slow rivers
Remarkable bright green net-like colonies — a tessellated honeycomb of cells visible to the naked eye. Beautiful under a microscope but a serious nuisance in garden ponds. Thrives in warm, nutrient-rich water. Manual removal is the primary method as few animals eat it effectively.
Keeping this species
- role
- nuisance — ponds
- cause
- high phosphate, warm stagnant water
- control
- manual removal, water change, UV steriliser
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Natural Habitat Temperature
57°F — 77°F seasonal range · (Dec low, Jul high)