When to Feed Goldfish Fry

Fresh hatchlings look like slivers of glass stuck to the tank walls. It’s tempting to drop food in right away, but they can’t eat it yet, and the leftovers only foul the water.

Start feeding when the fry let go of the glass and swim around looking for food. Breeder Bob Jones says they hang there for about two days while they absorb their yolk sacs.

Water temperature moves that day around, just as it moves the hatch itself. In a 2023 study, fry first ate about 9 days after laying at 64°F (18°C), 6 days at 72°F (22°C), and 5 days at 79°F (26°C).

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Find your first feeding day

Enter the day the eggs were laid and your water temperature to see when to have food ready.

Day the eggs were laidWater temperatureUnit°F°CTrack this clutch

A feeding schedule for the first four weeks

Fry age	What to feed	How often
Hatching until they swim	Nothing. The yolk sac feeds them.	No meals yet
First day of swimming	Tiny clouds of mashed or liquid fry food	A few small doses
Day 2 of swimming on	Newly hatched brine shrimp	3 to 5 small meals a day
About days 10 to 14 on	Add very fine daphnia, then the finest powdered food	3 to 5 small meals a day

This follows the routine in the Bristol Aquarists’ Society fry guide, where Bob Jones feeds four times a day, roughly every four hours. Aquarium Co-Op suggests a similar 3 to 5 small meals a day.

As the fry grow, the Merck Veterinary Manual lists crushed flake and small live or frozen foods as suitable choices.

Start the brine shrimp a day early

Brine shrimp eggs take about 24 hours to hatch in salt water kept at 80 to 82°F (27 to 28°C), says Ocean Rider’s hatching guide. Start a batch on the fry’s first day of swimming, and it will be ready the next morning, right when the schedule calls for it. Our step-by-step brine shrimp guide covers the salt, light, and harvest.

Offer small amounts at a time, because brine shrimp die quickly in fresh water. The same University of Florida guide explains why young Moina make a good freshwater food for fry.

How much to feed

Give only what the fry can finish, and watch them eat for a minute or two. Bob Jones siphons out uneaten food after a couple of hours and never leaves it in overnight.

Every meal adds to the waste in the tank. The University of Florida notes that more food means more ammonia, and you can’t see or smell it, so test the water daily while you’re feeding often.

How long fry can go without food

In a study of goldfish fry, fry that waited 4 or 8 extra days for their first meal survived about as well as fry fed on time. A 12-day wait cut survival.

That gives you a little room if food runs late, but it’s not a reason to wait. The researchers still advise against delaying the first feeding.

If fed fry still die

Fry that are eating can still be lost to water problems, crowding, or a swim bladder that never filled. If you’re finding losses each day, work through the common causes of fry deaths next.

The clutch tracker turns this schedule into a daily checklist for your fry’s age, so no feeding gets missed.