A chili rasbora eats a diet measured in dust. Adults of this Boraras species stay well under an inch, living in slow, leaf-stained peat swamp water where they pick microscopic insects, tiny worms and zooplankton from the surface film and plant surfaces. That origin sets the whole feeding brief: food must be powdered or alive and minute. Finely ground micro pellets, flake rubbed to powder between finger and thumb, and fine fry foods form the dry side; the live side — vinegar eels, microworms and baby brine shrimp in their first hours — is where chili rasboras feed most naturally, snapping at individual moving specks. A keeper who feeds them like small tetras, with ordinary crushed flake, will watch the shoal inspect the pieces and let them fall.
Making food the shoal can actually take
Grind the dry ration finer than seems reasonable, soak it in a little tank water, and swirl it in as a slow cloud at the rasboras' own level rather than sprinkling it on the surface. These fish feed through the upper and middle water in short darts, and a suspended cloud lets the whole shoal eat simultaneously instead of competing over a sinking trail. Live foods change their behaviour completely: over baby brine shrimp a drifting, shy shoal becomes an organised hunting group, and males intensify to their full brick red. Alternate live and powdered days across the week, and chop or strain frozen offerings hard — standard frozen daphnia is mostly too large, while the fine fraction of a thawed portion, rinsed and pipetted in, is taken readily. Feed in the calmest area of the tank, because nano food in filter current becomes filter food within seconds.
Small fish, short reserves
A chili rasbora carries almost no spare weight, so feeding frequency matters more than feeding volume. Two or three dust-sized meals a day, each cloud gone within a couple of minutes, keep a shoal in condition far better than one daily feed, and growing juveniles or a group you hope will spawn do best with a live feed included most days. The balancing risk is the nano tank itself: the same fine food that feeds rasboras fouls a small, warm, acidic volume quickly when overdone, and these fish are unforgiving of deteriorating water. Siphon the feeding area gently at water changes and let the shoal's look audit your portions — plump, red, active fish grouped loosely in open water are fed right, while a shoal thinning and paling at the plants is either underfed or living in water its own food is spoiling. If several fish lose condition together, test the water before enriching the diet.
Keeping a fiddly routine consistent
The difference between a thriving chili shoal and a fading one is usually routine, not menu: powder ground fresh, live cultures harvested on their days, portions kept to clouds rather than pinches. That is a routine easily lost when feeding passes between people, because one helper's generous pinch equals three days of another's careful ration. Writing the grind, the cloud method and the live-food days into KinsLe with Care Teams gives this tiny species a stable feeding pattern whoever is on duty, each feed checked off with a timestamp so the next person starts from fact, not from whether the fish look hungry — and chili rasboras, like most fish, always look hungry.