Do Corals Need Feeding?
It depends on the coral. Most benefit from some form of feeding, but the type and amount varies by species.
How Corals Get Energy
- Photosynthesis (via zooxanthellae): Symbiotic algae convert light into energy. For SPS, this is the majority of their needs.
- Heterotrophic feeding: Corals catch food particles from the water. LPS with large polyps are aggressive feeders; others passively absorb dissolved nutrients.
What to Feed
Broadcast foods (whole tank): Phytoplankton, amino acids (Reef Energy, AcroPower), powdered coral foods (Reef Roids, Coral Frenzy).
Target foods (specific corals): Frozen mysis shrimp, frozen cyclops, Reef Roids paste, live rotifers, oyster eggs.
Feeding by Coral Type
SPS: Mostly photosynthetic. Amino acids 2–3x/week and phyto 1–2x/week noticeably improve growth and colour. Avoid overfeeding — excess nutrients are a bigger problem than underfeeding.
LPS: The hungry ones. Target-feed frozen mysis or cyclops 2–3x/week. Turn off flow pumps for 10–15 minutes during target feeding so food doesn't blow away.
Soft corals: Mostly self-sufficient with good lighting. Broadcast phyto 1–2x/week and amino acids help with colour.
NPS (non-photosynthetic): Require daily target feeding — frozen mysis, cyclops, or live foods. A serious commitment not suited to beginners.
Signs of Overfeeding
- Rising nitrates/phosphates without other explanation
- Increased algae growth
- Cloudy water after feeding
- Skimmer overflowing
General rules: Start with less and increase gradually. Only target-feed what the coral will consume in 10–15 minutes. Better to feed smaller amounts more frequently.
A well-fed tank really shows in growth and colour. When building a collection from UK coral sellers on Reefsy, proper nutrition from day one gives new frags the best shot at thriving.
What feeding routines are working well for others?
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