A dwarf rainbowfish — the neon praecox rainbow — eats at the surface, and its anatomy announces it: a small, upturned mouth, a body built for darting, and eyes set for watching the water above it. Wild fish pick insects and their larvae from the surface film and graze tiny crustaceans and soft algae in slow, vegetated streams. In an aquarium that becomes a diet of small floating or slow-sinking foods: micro pellets that linger near the top, flake crushed lightly rather than powdered, and frozen or live daphnia, baby brine shrimp and mosquito larvae for the animal share, balanced by a spirulina-containing staple or the occasional blanched green for the plant share. Food that plunges straight to the substrate might as well not have been offered, because this species rarely bothers to follow it down.
Presenting food to a surface specialist
Release the ration just under the surface in the gentlest current you have, or briefly still the filter outflow while the school feeds, so the pieces hang in their layer long enough for every fish to make several passes. Thaw frozen foods and dribble them in slowly at the surface rather than dropping a single melting lump, which the boldest males monopolise while it sinks. Dwarf rainbows are schooling fish with a loose hierarchy, and the keeper's real job at feeding time is distribution: scatter along the tank's length, then add a second small sprinkle over wherever the females and younger fish are holding. Males in full display — body neon blue, fins edged red — are the hungriest-looking fish in the tank and the least reliable guide to how much the school actually needs. Colour-supporting prepared foods and regular brine shrimp keep that display colour honest, and a school that starts to look grey-blue and listless on an unvaried flake diet is asking for rotation, not quantity.
Two quick meals, not a constant buffet
An adult dwarf rainbowfish is only a couple of inches long, with a stomach to match, so split the day into two small surface meals cleared within a minute or two each. Juveniles colouring up can use a third small feed, preferably of baby brine shrimp or finely crushed staple, but adults kept on three full meals tend to gain weight around the belly while the water quality quietly worsens — surface foods are especially quick to film the water when overdone, and a greasy surface film also interferes with the gas exchange this active, oxygen-loving fish depends on. Skim or ripple the surface between feeds. If appetite drops across the school, test the water before changing foods; rainbows are often the first fish to go off their feed when conditions drift. Individual thin fish in an otherwise round school are usually being outmanoeuvred by dominant males, which feeding in two places at once generally fixes without any change of menu.
A routine small enough to hand over
The dwarf rainbowfish routine is precise in a way that suits a written handover: floating food only, two measured sprinkles, frozen food dribbled at the surface on its set days, done in minutes. Noting exactly that in KinsLe through Care Teams — with each feed marked complete as it happens — means a substitute feeder does not helpfully add a sinking pellet this species will never eat, and the school's colour-building variety survives whoever is holding the food tub.