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Fish food is one of those things beginners underestimate. The wrong food, or the right food fed the wrong way, leads to poor water quality, algae problems, and sick fish. The right approach is simple: feed high-quality food in small amounts, and vary the diet between frozen and pellets.
This guide covers the best food options for beginner reef tanks, what each one is good for, and how to build a feeding routine that keeps your fish healthy without trashing your water quality.
👉 Just getting started? See the full equipment list first: Reef Tank Equipment Guide
Quick Comparison: Best Reef Tank Fish Foods
| Food | Type | Best For | Waste Level | Difficulty |
|---|---|---|---|---|
| Hikari Frozen Mysis Shrimp | Frozen | Best overall, all reef fish | Low (if rinsed) | Easy |
| PE Mysis Frozen Shrimp | Frozen | Best nutrition / picky fish | Low (if rinsed) | Easy |
| New Life Spectrum Marine Fish | Pellet | Best daily pellet | Very low | Easy |
| Hikari Marine-S Pellets | Pellet | Best for small/nano fish | Very low | Easy |
| Hikari Enriched Brine Shrimp | Frozen | Best treat / training food | Low | Easy |
| Two Little Fishies SeaVeggies | Dried algae | Best for blennies / herbivores | Very low | Easy |
Frozen vs. Pellets: What’s Actually Better?
This is the most common feeding question in the hobby, and the honest answer is: both, used together.
Frozen food is nutritionally superior. It more closely mimics what reef fish eat in the wild, triggers a stronger feeding response, and will get picky or new fish eating when pellets won’t. The downside is that it’s messier, thawing frozen food releases nutrient-rich juices that can spike nitrates and phosphates if you’re not careful. Always rinse frozen food in RO/DI water before feeding and remove any uneaten pieces after 5 minutes.
Pellets are cleaner and more convenient. They’re nutrient-dense, produce minimal waste, and are ideal for auto feeders. Fish that are trained to eat pellets are much easier to care for long-term. The downside is that some fish, particularly new additions and finicky species, may take time to accept them.
The best feeding routine for a beginner: feed frozen food once a day as the main meal, and use high-quality pellets as a backup or second feeding. This gives your fish excellent nutrition without the mess of feeding frozen twice daily.
Best Reef Tank Fish Foods: Full Reviews
1. Hikari Frozen Mysis Shrimp, Best Overall
Hikari Mysis is the most recommended frozen food in the reef keeping community, and it’s the one food almost every beginner should have in their freezer. Mysis shrimp are nutritionally balanced, high in protein and fatty acids, and accepted eagerly by virtually every reef fish, including picky eaters. They’re small enough for nano fish like gobies and blennies and large enough to satisfy clownfish and grammas.
The key with any frozen mysis: thaw a small cube in a cup of tank water, then drain through a fine mesh strainer before feeding. This removes the nutrient-laden juice that would otherwise go straight into your water column and fuel algae growth.
- Best for: All reef fish, clownfish, grammas, gobies, blennies, cardinals
- Feeding tip: Rinse before feeding, feed what fish eat in 2–3 minutes max
- Waste level: Low when rinsed and not overfed
2. PE Mysis Frozen Shrimp, Best Nutrition
PE (Piscine Energetics) Mysis consistently wins community polls as the highest-quality mysis shrimp available. PE Mysis are wild-harvested freshwater mysis with a naturally high fat and protein content, noticeably richer than Hikari. If you have a picky eater that won’t take other foods, PE Mysis is often what finally gets them eating. Copperband butterflies, mandarins being weaned to frozen, and other notoriously difficult fish will frequently accept PE Mysis when they refuse everything else.
The trade-off: PE Mysis is oilier and messier than Hikari, and more expensive. Rinsing thoroughly is especially important. For everyday feeding, Hikari is fine, keep PE Mysis for problem eaters or as a high-value treat.
- Best for: Picky fish, new additions, fish being trained to eat frozen
- Feeding tip: Rinse very thoroughly, PE Mysis is notably oily
- Waste level: Medium if not rinsed well
3. New Life Spectrum Marine Fish, Best Daily Pellet
New Life Spectrum (NLS) Marine Fish pellets are the most consistently recommended reef pellet in the hobby. They’re nutritionally complete, made with whole marine ingredients, and known for producing excellent coloration in fish over time. Many experienced reefers run NLS as their sole dry food and supplement with frozen a few times a week, that’s how well-regarded it is.
NLS comes in multiple sizes, the 1mm pellet works for most community reef fish, and the 0.5mm size is better for nano fish. Fish train onto NLS quickly, and it works well in auto feeders for consistent daily feeding when you’re not home.
- Best for: Daily feeding for all reef fish; auto feeders
- Feeding tip: 1mm size for most fish; 0.5mm for nano species under 2 inches
- Waste level: Very low, pellets sink slowly and fish eat them efficiently
4. Hikari Marine-S Pellets, Best for Small and Nano Fish
Hikari Marine-S is purpose-built for small marine fish, the pellet size is tiny, making it ideal for firefish gobies, tailspot blennies, cardinalfish, chromis, and other nano species that struggle to eat standard-sized pellets. It’s widely available, affordable, and accepted readily by most small reef fish. Many reefers mix Marine-S with NLS in their auto feeder for variety and to make sure smaller fish get their share.
- Best for: Nano fish, gobies, blennies, cardinals, chromis
- Feeding tip: Great mixed with NLS in an auto feeder
- Waste level: Very low
5. Hikari Enriched Brine Shrimp, Best Training and Treat Food
Enriched brine shrimp are the best tool for getting new fish eating. Most fish, even picky ones, cannot resist live brine shrimp, and enriched frozen brine is the next best thing. The “enriched” version is soaked in vitamins and fatty acids before freezing, boosting its nutritional value significantly over plain brine shrimp (which is mostly water and not much else nutritionally).
Use enriched brine shrimp to train new fish onto frozen food, and then gradually mix in mysis over time. It’s also a great reward feeding when you want to get fish out of hiding or observe feeding behavior.
- Best for: New fish, picky eaters, training fish to eat frozen food
- Feeding tip: Mix with mysis gradually to train fish onto more nutritious food
- Waste level: Low when rinsed
6. Two Little Fishies SeaVeggies, Best for Blennies and Herbivores
If you have a tailspot blenny, lawnmower blenny, rabbitfish, or any herbivorous fish, they need algae in their diet, and dried seaweed sheets (nori) are the easiest way to provide it. Two Little Fishies SeaVeggies are the most recommended brand in the hobby. Clip a small piece to a veggie clip on the glass and let your herbivores graze naturally throughout the day. Most blennies and tangs go absolutely crazy for it.
Nori sheets from a grocery store (the kind used for sushi) work just as well and are significantly cheaper, make sure they’re plain with no added salt, seasoning, or oils.
- Best for: Blennies, tangs, rabbitfish, any fish that grazes on algae
- Feeding tip: Clip to glass with a veggie clip; remove uneaten portions after a few hours
- Waste level: Very low, fish graze at their own pace
How Much and How Often to Feed
Overfeeding is one of the most common causes of water quality problems in beginner reef tanks. The rule is simple: feed what your fish eat completely within 2–3 minutes, once or twice a day. Anything left over after that window is waste, remove it.
- Once a day: Fine for most beginner tanks with a light fish load
- Twice a day: Better for active fish and tanks with a protein skimmer to handle the extra waste
- Frozen food: Feed once a day, in the evening when fish are most active
- Pellets: Can be fed morning and evening; ideal for auto feeders
- Seaweed clips: Leave in the tank for a few hours, then remove any remaining
If you see uneaten food settling on the sandbed or rock, you’re feeding too much. Cut the amount in half and work back up slowly.
The Beginner Feeding Routine That Works
- Morning: Drop a small pinch of NLS or Hikari Marine-S pellets, use an auto feeder if you have one
- Evening: Thaw a small portion of Hikari Mysis (or PE Mysis), rinse through a strainer, feed slowly, remove anything uneaten after 3 minutes
- Clip seaweed: 2–3 times a week if you have blennies or algae grazers
- Test water weekly: If nitrates or phosphates are rising, reduce feeding first before adding equipment
This routine works in any beginner tank and keeps water quality manageable without a heavy equipment load.
Common Feeding Mistakes to Avoid
- Overfeeding is the #1 mistake, if you have an algae problem or rising nitrates, reduce feeding before anything else
- Not rinsing frozen food, the liquid in frozen food cubes is packed with phosphates; always rinse before feeding
- Feeding cheap flake food as the main diet, flakes break apart, cloud the water, and are nutritionally inferior to pellets or frozen
- Feeding too much variety too quickly, start with one frozen food and one pellet, then add variety once fish are eating reliably
- Ignoring water parameters after feeding changes, any change to feeding frequency or volume should be followed by a water test a few days later
Equipment That Makes Feeding Easier
- Auto feeder, feeds precise pellet amounts on a timer; essential if you travel or have irregular schedules
- Turkey baster, target feed shy fish like cardinals and gobies that don’t compete well at feeding time
- Veggie clip, holds seaweed sheets at the glass for herbivores to graze
- Fine mesh strainer, rinse frozen food before feeding; one of the most useful $5 purchases you’ll make
Related Guides
- Best Fish for a Beginner Reef Tank, what fish you’re feeding
- Reef Tank Equipment Guide, full system overview
- Best Reef Tank Test Kits for Beginners, monitor water quality after feeding
- Best Reef Tank Protein Skimmers, removes waste created by feeding
- Common Beginner Reef Tank Mistakes, overfeeding is on this list
The Bottom Line
Start with Hikari Frozen Mysis as your main food and New Life Spectrum Marine Fish pellets as your daily dry food. That combination covers virtually every beginner reef fish, produces minimal waste, and gives you a feeding routine that’s easy to stick to. Add SeaVeggies if you have a blenny or any grazing fish.
Keep feedings small, rinse your frozen food, and test your water regularly. Feeding discipline is one of the single biggest factors in keeping a beginner reef tank stable.