Red Ogo Gracilaria Macroalgae - Gracilaria parvispora
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Red Ogo Gracilaria, also known as Gracilaria parvispora, is a highly popular macroalgae valued for its vibrant red coloration, flowing branch structure, and excellent nutrient-export capabilities. Its soft, flexible fronds make it ideal for refugiums, sump systems, or as a natural grazing food source for tangs and other herbivores.
Common Name: Red Ogo Gracilaria
Scientific Name: Gracilaria parvispora
Family: Gracilariaceae
Size: Typically grows into loose, branching clusters several inches across
Difficulty: Easy
Native Region: Hawaiian Islands and Indo-Pacific
Tank Size: Suitable for nano to large systems
Temperature: 72–80°F (22–27°C)
pH: 8.0–8.4
Lighting: Moderate to high
Substrate: Not required; best kept tumbling or placed in a low-to-moderate flow refugium
• Excellent nutrient export that helps stabilize water quality
• Highly palatable to herbivorous fish—ideal supplemental food
• Grows best when gently tumbled to prevent detritus buildup
• Enhances refugium biodiversity and provides microhabitat for copepods