Corals get a lot of their energy from light through their zooxanthellae, but light alone doesn’t cover everything a coral needs to grow fast, build strong tissue, and hold real color. Spot feeding — delivering food directly to individual coral polyps rather than dumping it in the water and hoping — is one of the simplest ways to close that gap, and it’s one of the more noticeable upgrades you can make once the basics of a tank are already dialed in.
What Spot Feeding Actually Is
Spot feeding (also called target feeding) means putting food directly onto or right next to a specific coral’s polyps, rather than broadcasting it across the whole tank and letting whatever gets eaten get eaten. It’s most useful for corals with larger mouths and visible feeder tentacles — hammers, frogspawn, torches, acans, and Duncans in particular respond well and will visibly grab food when it’s placed right in reach.
How to Spot Feed
Turn off flow in the immediate area (and your return pump, if the coral is close to an outlet) so food doesn’t get blasted away before the polyps can grab it. Load a turkey baster or syringe with a small amount of tank water mixed with your food of choice — Reef-Roids, BeneReef, mysis, or a similar mix — and gently release it right over the open polyps. Some reefers place an old skimmer cup or a bottle with the bottom cut off over the coral first, which contains the food in one spot long enough for the coral to actually eat it before it drifts off. Give the coral a few minutes to actually feed before turning flow back on, and use a clean syringe every time to avoid introducing anything you don’t want in the water.
How Often to Spot Feed
Once or twice a week is the standard starting point for most corals, and it’s worth starting on the lighter end and watching how your tank’s nutrients respond before increasing frequency. LPS corals like hammers, torches, and Duncans do well fed roughly weekly to every other week; soft corals benefit from occasional feeding but need it less; and SPS generally get most of what they need from broadcast feeding and dosed foods rather than individual spot feeding, given how small their polyps are. Spot feeding isn’t mandatory for tank survival — most corals do fine on broadcast feeding and light alone — but it’s one of the more effective optional upgrades for growth and color once your water parameters are stable.
The Best Time to Feed
Many corals extend their polyps more, and feed more actively, in the hour before and after lights dim in the evening — that dusk window mimics when a lot of natural plankton activity picks up on a real reef, and fish tend to be calmer then too, competing less for the food meant for coral. That said, corals are creatures of habit: if you consistently spot feed at the same time of day, even midday with lights on, your corals will learn to extend polyps in anticipation of that schedule. Consistency matters more than hitting a specific hour — pick a time you can stick to and your corals will adjust to it.
Spot Feeding vs. Broadcast Feeding
Broadcast feeding — dispersing food across the whole tank — is faster, less hands-on, and works well for corals with tiny polyps that can’t really be individually targeted anyway, plus it reaches fish and pods at the same time. The tradeoff is precision: most of what you broadcast never reaches a coral polyp at all, and dumping food into the water column all at once can spike nutrients and feed algae faster than the same amount delivered by spot feeding. Spot feeding is more work — turning off flow, targeting individual corals, waiting for them to feed — but it puts food exactly where it’s needed and wastes far less in the process, which is why it shows the most noticeable results on the specific corals that get it directly. Most experienced reef keepers use both: broadcast feeding as the baseline for the whole tank, and spot feeding as a targeted boost for LPS and other corals that respond well to direct attention.
Amino Acids: What They Do and How Much to Dose
Amino acids are the building blocks corals use to construct proteins for tissue growth and repair, and dosing them directly gives corals a shortcut to nutrients they’d otherwise have to synthesize or extract slowly from other food sources. The visible results tend to be increased polyp extension, better fluorescent coloration, and faster tissue growth and recovery — amino acid dosing is a commonly recommended step for helping a stressed or recently-fragged coral heal and re-extend tissue. Dosing varies by product, but a typical starting point is a small daily dose (for example, roughly 5 mL per 50 gallons for a product like Brightwell CoralAmino) for the first few weeks, adjusted up gradually based on your coral load and how the tank responds — more isn’t automatically better, and overdosing amino acids can fuel a cyanobacteria bloom, since it’s an organic nutrient input like any other. If you run a protein skimmer, turn it off for 15–20 minutes after dosing so it doesn’t just strip the amino acids back out before your corals get the benefit.
The Bottom Line
Spot feeding once or twice a week, timed consistently (ideally around dusk), gets food directly to the corals that benefit most from it — mainly LPS with visible feeder tentacles — with far less waste than broadcast feeding alone. Pair it with an occasional, conservative amino acid dose for a real boost in color and growth, and keep an eye on nutrients as you scale any of it up. Questions about building a feeding routine for your specific coral mix? Reach out, or browse our current WYSIWYG picks while you’re here.
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