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algaehardSaltwater

Bryopsis

Bryopsis sp.

Family: Bryopsidaceae

📍 Worldwide in tropical and subtropical seas

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Feathery, fern-like dark green algae that is notoriously difficult to eliminate — one of the most persistent reef tank nuisances. Resistant to most herbivores. Best controlled by raising magnesium to 1500–1800 ppm for 2–4 weeks (magnesium treatment). Sea hares will consume it but are not a permanent solution.

Keeping this species

role
nuisance — difficult to remove
control
magnesium treatment (1500–1800 ppm for 2–4 weeks), Sea Hare (temporary)
warning
resistant to most herbivores and chemical treatments

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Tips from the community 💡

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Natural Habitat Temperature

81°78°75°JFMAMJJASOND

75°F 81°F seasonal range  · (Jan low, Jun high)

Stats

Community tips0
Kept by0 hobbyists