A corydoras grab bag exists for one job: moving a whole shoal of small, barbelled bottom-dwellers out of a failing tank without shredding their whiskers, chilling them, or splitting the group up. Corydoras are social, easily startled, and equipped with sharp fin spines that puncture thin bags, so this kit is built around sturdy containment, darkness, oxygen, and familiar food rather than around generic fish supplies.
Containment that protects barbels and spines
Double-bagging is the starting point for corydoras because a single thin bag can be pierced by a pectoral spine when a startled fish darts. Pack extra-thick fish bags, rubber bands, and a rigid lidded tub to hold the bags upright so the shoal is not sloshing in a shallow puddle. Nothing in the transport container should have rough edges: corydoras explore with their barbels, and gravel, sharp decor, or a coarse net in the emergency container can damage those sensory whiskers. A soft, fine-mesh net belongs in the kit for the same reason — a wide coarse net traps spines and turns a quick transfer into a wrestling match.
Air, warmth, and water chemistry on the move
Corydoras breathe at the surface as well as through their gills, but a sealed bag still runs short of oxygen on a long journey, so a battery air pump, spare batteries, tubing, and a small airstone earn their place in this kit. A bottle of water conditioner lets whoever reaches safety first prepare fresh water that matches what the shoal left behind. An insulated bag or a towel for wrapping slows temperature swings, because corydoras moved from a warm community tank into a cold car or shelter chill quickly for their size. A simple thermometer helps you check the transport water before you start improvising with warm bottles.
Food and familiarity for a bottom-feeding shoal
Pack a small sealed portion of the exact sinking wafers or granules your corydoras already eat, because bottom feeders that have just been netted, bagged, and driven across town rarely accept a brand-new food. The portion only needs to cover a short stay — overfeeding a temporary tub fouls it far faster than hungry corydoras come to harm, and uneaten sinking food disappears into corners where it rots unseen. A short length of smooth pipe or a clean clay pot shard gives the shoal somewhere to huddle together in the holding tub; corydoras settle noticeably faster when the whole group can shelter in one dark spot than when they are scattered across bare plastic.
The information card that travels with the fish
Write down the corydoras species and how many there are, because a helper counting fish into a tub needs to know when one is still hiding in the home tank. Note their usual temperature, feeding routine, and any recent illness or treatment in plain language. Tape one copy to the tub and keep the fuller version with your own documents, so the information survives even if the kit gets separated from you. Photograph the shoal in its home tank as well — a clear picture helps a shelter volunteer or friend confirm the group arrived complete. Keeping those details gathered in KinsLe Pet Passport means a corydoras handoff never depends on someone remembering barbels, group size, and feeding notes under pressure.