Coral Feeding Guide | Nutritional Supplementation Beyond Photosynthesis
Corals' nutrient sources extend beyond photosynthesis alone. This guide details feeding methods using amino acids, phytoplankton, and powdered foods, along with species-specific nutritional supplementation techniques.
Key Takeaways
Corals' nutrient sources extend beyond photosynthesis alone. This guide details feeding methods using amino acids, phytoplankton, and powdered foods, along with species-specific nutritional supplementation techniques.
Related Species
Corals produce energy through photosynthesis via symbiotic zooxanthellae living in their tissues, but this alone is insufficient for healthy growth and vibrant coloration. In their natural habitat, corals capture additional nutrition by preying on plankton and dissolved organic matter. In aquarium environments, these nutritional sources are severely limited, making proper feeding essential to compensate. For large polyp corals (LPS) with expansive polyps and azooxanthellate corals in particular, feeding is not merely beneficial for aesthetics—it is a critical management requirement for survival.
Coral Nutrition Uptake Mechanisms
Corals obtain nutrition primarily through three pathways:
- Zooxanthellae photosynthesis: Symbiotic algae use sunlight (or LED lighting) to generate sugars, which are supplied to coral tissue
- Polyp predation: Tentacles directly capture plankton and particulate matter
- Absorption through body surface: Dissolved organic matter, amino acids, and trace elements are absorbed across the entire body
Photosynthetic corals depend on photosynthesis for 70–90% of their energy, with the remaining 10–30% sourced from external nutrition. This "remaining" percentage significantly influences growth rate and coloration intensity.
Amino acids serve as structural building blocks for coral tissue, fatty acids provide energy, and vitamins promote metabolism. Since aquarium environments cannot easily replicate the abundant plankton densities of nature, intentional supplementation creates the difference between vibrant color and robust growth.
Types of Coral Foods and Selection Guide
Coral foods are broadly classified into three categories. Understanding their distinct characteristics and proper application is key to successful feeding.
Liquid Foods
These products contain phytoplankton or amino acids and are suited for "broadcast feeding"—distributing food throughout the aquarium. Products like Reef Energy and Coral Frenzy are popular examples. They work well for SPS corals and soft corals with large surface areas, allowing body-surface absorption when suspended in the water column.
