Quick Stats
Care Level: Easy–Moderate
Temperament: Peaceful
Color Form: Iridescent Blue & Purple
Diet: Photosynthetic (nutrient-exporting macroalgae)
Reef Compatible: Yes
Lighting: Medium–High
Water Conditions: 72–78°F / 22–26°C, pH 8.0–8.4, dKH 8–12, sg 1.023–1.026
Growth Rate: Medium
Origin: Tropical & Subtropical Oceans
Family: Rhodymeniaceae
Overview
Hypnea pannosa is an ornamental red macroalgae prized for its iridescent morphotypes in blue and purple, which create stunning visual effects in reef aquariums. The blue morphotype shines under low-nutrient conditions with metallic reflections, while the purple morphotype thrives in slightly richer systems, offering vibrant hues.
Beyond its aesthetic appeal, this species is highly functional, efficiently exporting nitrates and phosphates to help maintain water quality. Its medium growth rate and peaceful nature make it easy to maintain in established reef systems. When properly cared for, Hypnea pannosa becomes both a visual centerpiece and a natural ally for nutrient management.