Start the corydoras morning on the tank floor
A corydoras catfish morning routine works when it follows the fish down to the substrate, because this schooling bottom-dweller spends its waking hours nose-down, sifting sand for food. Let the lights come up, then wait a few minutes before judging anything: a healthy group stirs, gathers loosely, and begins its shuffling patrol along the front glass. Count the school while it is moving. A corydoras sitting alone under a plant while the others graze is the one piece of morning information worth acting on later.
Look at the barbels before you feed
The barbel check belongs early in a corydoras routine because the whiskers around the mouth are this fish's main tool for finding food, and their condition tells you about the substrate it works in. Watch one fish at close range as it digs: the barbels should look full-length and flexible, sweeping the sand as the fish snuffles forward. Shortened or ragged barbels in a corydoras often go with coarse or dirty substrate, so note what you see and check whether waste has collected in the corner where the group feeds. This is an observation habit, not a diagnosis, and a fish that stops digging or loses interest in the group is the one to raise with an aquatic vet or experienced fish shop.
Put breakfast where a bottom fish can keep it
Feeding a corydoras catfish fails when the food never reaches the floor, so drop sinking pellets or a broken wafer onto an open patch of sand after the mid-water fish have had their first mouthfuls higher up. Spread two or three small piles rather than one, because a school feeds shoulder to shoulder and a single pile leaves the shyest fish circling the edges. Then step back for at least half an hour. Corydoras graze slowly, returning to a pellet between patrols, and food removed after five minutes because it looks untouched usually means the school barely started.
Siphon the feeding corner, not the whole tank
A corydoras morning tidy is a targeted job: use a small siphon or turkey baster to lift leftover food and waste from the feeding patch and the low-flow corner behind the wood, where debris settles overnight. Leave the rest of the sand alone; daily disturbance of the whole bed stresses a fish that burrows its face into it. Top up any evaporation with treated water at the tank's temperature, poured gently against the glass so the current does not blast the group mid-graze.
Write down who does the bottom round
The corydoras routine holds together when the sinking-food step is never assumed, because surface feeding is visible and bottom feeding is easy to forget or double. Note the number of pellets, the feeding patch you use, and the half-hour grazing window in the tank's care notes. In KinsLe, Care Teams lets you place that corydoras bottom round on one named person's morning list and see its completion timestamp, which keeps two helpful family members from feeding the school twice on the same day.