Betta Fry Feeding Schedule: Week-by-Week Success Guide

Losing betta fry in the first two weeks is heartbreaking—and almost always preventable with the right feeding schedule. This guide walks you through exactly what to feed, how much, and how often from the moment your fry start free-swimming through eight weeks of age. You'll learn which live foods work best at each stage, when to introduce dry options, and the specific mistakes that cause the most fry deaths. No fluff, no corporate speak—just what actually works in a home aquarium.

Week 1: First Foods and the Critical Transition

Your betta fry become free-swimming roughly 3-5 days after hatching. That's when the real work begins. In their first week, fry need food smaller than their mouths—tiny particles they can actually consume. Infusoria is the traditional first food, cultured in a separate jar for 5-7 days before your fry need it. If you didn't culture infusoria in advance, liquid fry food from the pet store works as a backup, though growth rates will be slower.

During this first week, feed three times daily with the tiniest amounts possible. We're talking a few drops of infusoria or enough liquid food to cloud the water slightly for 30 minutes. Uneaten food pollutes the tank fast at this stage, so observation is critical. If the water stays clear after 20 minutes, you're feeding too much. If the fry look bellied-out and active, you're on track.

Temperature matters here. Keep the fry tank at 80-82°F for optimal digestion and growth. Colder water slows metabolism, meaning fry eat less and grow slower—setting you back weeks.

Week 2-3: Baby Brine Shrimp Takes Over

Around day 7-10, your fry should be ready for baby brine shrimp (BBS). This is the gold standard for betta fry nutrition—high protein, perfect size, and greedily accepted. You'll need to hatch your own shrimp using brine shrimp eggs and a simple setup. Two tablespoons of eggs produce enough BBS for a typical fry batch.

Start with one feeding of BBS per day, replacing one of the previous food sessions. By day 10-12, you can switch entirely to BBS for two feedings daily. The third feeding can remain infusoria or liquid food if your fry are still small. Harvest BBS twice daily for maximum nutrition—after 24 hours, the shrimp grow larger and less appealing to young fry.

Portion control means offering what the fry can clear in 10-15 minutes. Expect each fry to consume 5-10 BBS per feeding at this age. If BBS are still wriggling after 15 minutes, you've overfed or your fry count is lower than expected.

Week 4-5: Adding Variety and Dry Foods

At four weeks, your fry should be visibly larger and more robust. This is when you can start introducing variety. Microworms are an excellent live food option—easy to culture, always available, and accepted enthusiastically by fry this age. Blackworms (chopped if large) and grindal worms also work well.

Dry food introduction becomes possible around week 5. Crushed flakes the size of breadcrumbs are your safest bet—betta-specific flakes ground to powder between your fingers. Soak dried foods in tank water for 5 minutes before feeding to prevent buoyancy issues. Floating pellets cause more waste than they solve at this size.

Continue with BBS as your primary food, offering it twice daily. Supplement with one microworm feeding or one dry food session. Variety prevents nutritional gaps and gets fry accept different foods early—useful if you ever need to travel or can't culture live food.

Week 6-8: Growing Toward Juveniles

By six weeks, your betta fry should resemble miniature adults with developing fins and more aggressive feeding behavior. Continue offering BBS twice daily, but increase portions as fry consume more. You can add a third feeding of microworms, chopped blackworms, or crushed flake.

At this stage, protein content matters most. Your goal is 40-50% protein across all foods. If using dry foods, choose high-protein betta formulas. Live foods should remain the foundation—fry raised on live food exclusively typically show better color development and faster growth.

Watch for aggression at feeding time. If dominant fry are bullying smaller ones away from food, consider splitting the batch or feeding in multiple locations. Unequal growth at this stage often leads to the largest fry hunting the smallest—that's a different problem, but one you can prevent with proper feeding distribution.

Live Food vs Dry Food: What Works Best

Here's the honest answer: live food produces faster growth and higher survival rates. Baby brine shrimp alone can yield 90%+ survival in healthy batches. Dry food alone often drops that to 60-70% in my experience. But live food culturing takes time and effort that not everyone has.

The practical approach is a hybrid. Use live foods as your primary nutrition, especially in weeks 1-5 when growth rates are fastest and most critical. Supplement with dry foods to reduce culturing workload and accustom fry to prepared foods. This approach gives you the benefits of both systems without burning out.

Commercial fry foods have improved significantly. Brands like fry-specific formulations provide adequate nutrition when live foods aren't available. Freeze-dried foods are less suitable—poor rehydration causes digestive issues in young fry. Always soak and rinse freeze-dried options thoroughly if you use them.

Common Feeding Mistakes That Kill Fry

Overfeeding: The single biggest killer of betta fry. Excess food pollutes water rapidly, spiking ammonia and nitrite within hours. Fry are tiny—overfeeding by what seems like a small amount translates to a massive pollutant load in their small tank. Start conservatively and increase only when you've confirmed fry are consuming everything.

Inconsistent schedules: Fry need predictable feeding to grow steadily. Missing meals or irregular timing causes stress and stunted growth. Once you establish a feeding rhythm, maintain it.

Low-quality food: Expired or degraded foods lose nutritional value rapidly. Brine shrimp eggs lose hatch rates after six months. Dry foods degrade in opened containers. Use fresh sources and store properly.

Ignoring water quality: Feeding schedules mean nothing if water parameters are wrong. Frequent small water changes keep the tank clean enough for fry to thrive. Dirty water kills fry faster than hunger does.

Troubleshooting: When Fry Aren't Growing or Eating

If your fry aren't growing despite regular feeding, check your food quality first. Baby brine shrimp that sit too long lose nutritional value. Microworms kept at warm temperatures spoil quickly. Try fresher cultures or different food sources before assuming a deeper problem.

Fry refusing food often signals water quality issues. Test ammonia immediately—even trace amounts discourage feeding. Perform a 30% water change and test again. Temperature swings also suppress appetite—ensure your heater is functioning properly and the tank isn't near drafts or heating vents.

Smaller fry in a batch will always exist. If the size disparity is extreme (some twice the size of others), separate them into different tanks. Otherwise, target-feed smaller fry by placing food directly in their area during feedings. Most size differences even out by adulthood if all fry receive adequate nutrition.

Your Week-by-Week Feeding Timeline

Days 1-7: Infusoria or liquid fry food, 3 feedings daily, minimal amounts. Temperature 80-82°F.

Days 7-14: Begin baby brine shrimp. Replace one feeding daily with BBS. Continue 3 feedings total.

Days 14-21: Transition to BBS as primary food, 2 feedings daily. Small amounts of infusoria or liquid food acceptable.

Days 21-35: BBS twice daily. Introduce microworms or other live foods. Begin crushed flake试探.

Days 35-56: BBS twice daily plus one supplement (microworms, flake, or other appropriate food). Increase portions as fry grow.

Adjust amounts based on consumption. Fry should have slightly rounded bellies after feeding but not visibly distended. Activity level and coloration indicate health more accurately than belly size alone.

Frequently Asked Questions

How often should I feed betta fry?

Feed betta fry three times daily in their first two weeks, then reduce to twice daily from week three onward. Young fry have small stomachs and high energy demands—they need frequent small meals to grow properly. Skipping feedings or going more than 12 hours without food causes stress and stunted growth.

What is the best food for newly hatched betta fry?

Infusoria is the traditional first food for betta fry, followed immediately by baby brine shrimp. Both are small enough for newly free-swimming fry and provide excellent nutrition. If you can't culture live foods, high-quality liquid fry food works as a temporary substitute, though growth rates will be slower.

Can betta fry survive on dry food alone?

Betta fry can survive on dry food, but survival rates and growth speeds suffer noticeably. Live foods—especially baby brine shrimp—produce dramatically better results. A hybrid approach using primarily live food with dry food supplementation gives you the best balance of nutrition and practical convenience.

Why are my betta fry dying despite regular feeding?

Water quality is usually the culprit when fry die despite apparent good feeding. Test for ammonia and nitrite immediately—even trace amounts kill fry. If parameters are fine, evaluate food freshness and portion sizes. Overfeeding causes pollution that spikes ammonia within hours, creating a cycle of death that looks like starvation.