Newborn livebearer fry arrive more capable than most baby fish: they are born free-swimming, with their yolk absorbed, and they look for food within hours. What limits them is not willingness but size and stamina. Their mouths are tiny, their stomachs hold very little, and they burn energy fast, so feeding them well means food that fits, offered often, placed where they actually spend their time — in and around cover, not in open water.
Foods small enough for a newborn mouth
Baby brine shrimp are the classic first food for a reason: they are the right size, they move, and fry chase them instinctively, which gets even shy babies feeding. Microworms serve the same purpose for the smallest fry and sink slowly through the cover where the babies hide. For dry options, powdered fry food and flake crushed between your fingers to a fine dust both work; rub it finer than feels necessary, because a crumb a newborn cannot swallow is decoration, not dinner. In a planted tank, fry also graze microscopic life and soft algae from leaves between meals, which quietly tops up the shyest feeders.
How often, and how much
Several small meals spread across the day suit newborns far better than one or two large ones. A pinch sized to be eaten within a couple of minutes, repeated at intervals, keeps bellies gently rounded without leaving clouds of waste food drifting into the plants. Watch bellies as your measure: after a good feed, fry look slightly plump; before the next, they should look slim but not pinched or hollow. In the first week a missed day matters, and so does an overfed hour, because rotting powder fouls warm water fast.
Feeding fry where they hide
Scatter food over the plant thickets and floating cover rather than in the open middle of the tank. Newborns stay close to refuge, and food that lands there reaches all of them, including the cautious ones that will not venture out while adults cruise nearby. If the fry are still in the main tank, feed the adults at the opposite end first; a busy adult is a distracted adult, and the fry get an undisturbed few minutes at their own meal. Turning the filter flow down briefly, or using a sponge filter from the start, stops fine food being swept away before the babies find it.
Growing the menu as they grow
Across the first weeks the menu widens with their mouths. Slightly coarser crushed flake, small pellets ground down, and larger live or frozen foods can join the rotation as you see fry managing bigger pieces without spitting them out. Growth is your feedback: a batch fed well and often grows evenly and colours early, while underfed fry stay translucent and stunted-looking despite clean water. If some fry race ahead, add an extra feeding spot at the far end of the cover so the smaller ones are not outcompeted at a single station.
Keeping the water safe around frequent feeding
Powdered food and clean water are in constant tension in a fry tank. Siphon the bottom gently with narrow tubing after feeds, top up with temperature-matched, conditioned water, and prefer small frequent water changes over large rare ones, since newborns dislike sudden swings. Cloudy water, food fuzzing on the bottom, or fry gasping at the surface are signs to change water immediately and cut the next feed's size, and a batch that stops feeding altogether in dirty water needs the water fixed before it needs more food.
Because newborns eat little and often, the feeding rota is the whole job in the first fortnight, and KinsLe Care Teams lets you assign each small feed to a named person per pet tank, with completed feedings timestamped so nobody guesses.