Feeding Checklist for Reef Keeping

Active planktivores like anthias and chromis usually do better with 2-4 small feedings daily, while many tangs, clownfish, and wrasses can thrive on 1-2 feedings. Underfeeding causes weight loss and aggression, but oversized meals often leave excess waste that pushes nitrate and phosphate upward.

Fish, LPS corals, SPS corals, filter feeders, shrimp, and urchins do not all need the same foods or timing. Writing separate target foods and schedules prevents overfeeding the whole tank just to satisfy one coral or invertebrate.

Feed at roughly the same times each day so fish learn the routine and timid animals have a chance to compete. Many reef keepers use a daytime fish feeding schedule and a lights-down coral feeding session 30-90 minutes after main lights dim.

A practical range for many mixed reefs is nitrate around 2-15 ppm and phosphate around 0.03-0.10 ppm, though some systems run higher or lower. Feeding should support livestock health without driving nutrients beyond what your export methods can control.

A lightly stocked 20 gallon reef with minimal filtration will handle far less food than a 150 gallon system with a strong skimmer, refugium, and filter roller. Feeding plans should reflect real filtration capacity, not just livestock appetite.

Mandarins, scooter dragonets, pipefish, and some leopard wrasses may not compete well during broadcast feeding. On the other hand, tangs and larger wrasses can dominate the water column, so plan target placement or multiple feeding points.

Thawing mysis, brine, copepods, or reef blends in a small cup lets you inspect portion size and distribute food more evenly. Dumping frozen cubes directly into the display often leads to clumps, missed feeding opportunities, and localized waste.

Some frozen foods release packing juices that can add extra dissolved organics and phosphate. If your tank is already running high, such as phosphate above 0.10 ppm, rinsing through a fine mesh can reduce unnecessary nutrient input.

Large LPS polyps may accept mysis, chopped krill, or pellet pieces, while SPS and filter feeders respond better to fine particulate foods, rotifers, reef roids-style powders, or live phyto depending on the animal. Matching particle size improves capture and reduces wasted food settling in rockwork.

Fish recovering from stress, shipping, or head and lateral line erosion often benefit from foods enriched with vitamins, amino acids, or HUFA products. This is especially useful for finicky species that only accept frozen foods and need higher nutritional density in small portions.

Nori, red algae sheets, or macro-based pellets help meet the constant grazing needs of herbivorous fish. Offering algae 3-7 times per week often reduces nipping, pacing, and competition during meaty feedings.

Pellets should be small enough to be swallowed quickly, and coral foods should fit the polyp size. Large uneaten pieces often end up in overflows, sand beds, or behind rock structures where they break down and fuel cyanobacteria or nuisance algae.

A good fish feeding amount is usually what the tank can consume quickly without leftovers drifting into the sump. If food is still circulating after a minute, reduce the next feeding or split the portion into smaller rounds.

Adding food at two or three locations helps timid fish eat before aggressive tangs, damsels, or wrasses take over. This is especially helpful in long reef tanks where subordinate fish tend to stay near one side or hide in rockwork.

Fish such as mandarins, seahorses in species systems, and newly imported butterflyfish may need food delivered directly near them. A turkey baster, coral feeder, or pipette gives precision and improves intake without dumping extra food across the whole tank.

Alternate pellets, frozen mysis, copepods, brine, chopped seafood, and algae-based foods to cover nutritional gaps. A single-food diet can keep fish alive, but mixed diets often improve coloration, body condition, and spawning behavior.

Pinched bellies, hollow areas behind the head, faded coloration, and increased aggression often show up before obvious disease. Species with high energy needs can look active while still slowly losing weight if meal frequency is too low.

Mysis, clam, or pellet buildup in dead spots quickly decomposes and can push nitrate and phosphate higher. Use a siphon, baster, or net after feeding if food collects in low-flow areas.

Many LPS corals like acans, blastos, scolys, and trachyphyllia readily take meaty foods, while most SPS depend more on light, dissolved nutrients, and fine suspended foods. Feeding every coral the same way often wastes food and can irritate sensitive tissue.

Use a pipette or feeding tool to place small portions of mysis, brine, or coral pellets on extended mouths. Temporarily reducing flow for 10-20 minutes helps the coral secure food instead of letting shrimp, fish, or current steal it away.

Powdered coral foods, rotifers, oyster eggs, or similar fine feeds can support polyp response and tissue fullness, but only in small amounts. Overdoing broadcast feeds often clouds the water, clogs mechanical filtration, and drives measurable nutrient spikes within days.

Sun corals, dendronephthya, some gorgonians, and other non-photosynthetic animals need frequent particulate feeding, sometimes daily or multiple times per day depending on species. These animals are beautiful but place a heavy nutrient burden on the system if not planned carefully.

Feather dusters, clams, sponges, and some gorgonians respond better to live phytoplankton or very fine suspended particles than to chunky foods. Dose these foods in measured amounts and monitor skimmer response and nutrient trends closely.

Peppermint shrimp, cleaner shrimp, emerald crabs, and some hermits often steal food directly from coral mouths. Feeding these scavengers on the opposite side of the tank first can give corals enough time to close around their meal.

A stressed coral with damaged tissue may reject food or trap it against compromised flesh, which can worsen bacterial issues. Stabilize alkalinity, salinity, and flow first, then resume feeding once polyp extension and tissue recovery improve.

Any meaningful food increase should be followed by nutrient testing over the next 7-14 days. This helps you catch a rise early before hair algae, dinoflagellates, or cyanobacteria gain momentum.

Protein skimmers often react within hours to oily frozen foods, coral feeds, or amino supplements. If the skimmer overflows or suddenly produces dark skimmate faster than normal, it is a sign feeding input may need adjustment or timing changes.

Filter socks, rollers, or floss can clog quickly after fine foods are added to the water column. Replacing or checking them within 12-24 hours prevents trapped organics from breaking down and returning nutrients to the system.

Improved feeding can increase calcification and tissue growth, especially in LPS and SPS systems. If alkalinity begins dropping faster than usual from your baseline, for example from 8.0 dKH to 7.4 dKH in a few days, increase dosing carefully rather than blaming test error.

A small increase in film algae is often the first visible sign that food input has exceeded export. Check glass cleaning frequency, rock surfaces, and low-flow sand patches after introducing new frozen blends or coral powders.

Ultra-low nutrients can be just as problematic as excess nutrients, especially in SPS systems where corals may pale or lose polyp extension. If nitrate falls near 0 ppm or phosphate becomes unreadable, slightly heavier feeding may help restore balance before resorting to bottled nutrient dosing.