Why dry-sprinkled powder ends up on the floor
Powdered fry food has a physics problem before it has a nutrition problem. Sprinkled dry onto the surface, the finest particles ride the surface tension and drift to the corners, some clump into grains too big for a fry's mouth, and the rest sink past the fry's feeding zone to the floor, where no fry will graze them back up. Fry are water-column feeders in their first weeks: they take what hangs in front of them at their own level. Once a particle has landed, it belongs to the bacteria, and in a small, warm, heavily fed nursery tank it starts costing you water quality within hours. Every technique that works is the same one — keep the powder suspended, at the fry's depth, for the few minutes they need.
Make a slurry and deliver it with a pipette
Put a pinch of powder, genuinely less than looks reasonable, into an egg cup or small pot, add tank water, and stir it into a cloudy slurry. Draw the slurry into a pipette or a syringe without a needle and release it slowly, a gentle squeeze at a time, just above and slightly upstream of where the fry are gathered, so the cloud drifts through them rather than onto them. The fry strike at the particles as they hang and sink slowly through the group, which converts a food most of which missed into a food most of which is eaten. Using tank water for the slurry matters: it keeps temperature and chemistry identical, and it wets every particle so nothing arrives at the surface dry and unsinkable.
Portion by the clock, not by the scoop
The right dose of powdered food is defined by time, not by measure: it is the amount the fry clear from the water in a few minutes, leaving the water barely hazed. If a visible cloud is still drifting after five minutes, the last feed was too big — halve the next one. Fry stomachs are tiny and empty quickly, so the pattern that suits both the fry and the water is small feeds repeated through the day rather than one or two generous ones; four to six slurry deliveries will grow fry faster and cleaner than two heavy sprinklings. Judge bellies as you go — fry with gently rounded bellies an hour after feeding are being fed right, while permanently distended fry signal too much at once.
Clean up like it is part of the feeding, because it is
Even good slurry work leaves a residue, so build the removal into the routine rather than treating it as an occasional deep clean. After the final feed of the day, run a length of airline tubing as a mini siphon along the floor — the flow is gentle enough not to trouble fry, and it lifts the day's settled powder and waste before either can rot overnight. A bare-bottomed nursery tank makes this a two-minute job; if the fry are over substrate, target the feeding corner where the fallout concentrates. Top up what the siphon took with treated water matched to the tank, little and often, and the water stays ahead of the feeding instead of chasing it.
Graduate the food before the powder becomes the problem
Powder is a first food, not a six-week diet, and part of feeding it cleanly is knowing when to leave it. As the fry grow over the first weeks, begin offering newly hatched baby brine shrimp or finely sieved alternatives alongside the slurry — live foods that swim stay in the water column on their own, are hunted eagerly, and produce a fraction of the fallout. Phase the powder down as the fry take the larger foods, keeping it only for the smallest runts. Rotating who gives the day's many small feeds is where batches go wrong, with two helpers each assuming the other has not fed; listing every feed as a ticked duty in KinsLe Care Teams gives each slurry, each top-up and each evening siphon an owner, so the fry get their six small meals exactly once each.