Polystictus Corydoras

Corydoras polystictus

Animalia›Chordata›Actinopterygii›Callichthyidae

📍 Mato Grosso, Brazil

A small, attractively marked corydoras covered in small dark spots over a pale body. C. polystictus is a peaceful, undemanding species that adapts well to a range of water conditions. It is an active forager and looks charming in a planted aquarium with a dark sand substrate that shows off its spotted pattern.

Size2"

Min Tank15g

School6+

peaceful

Zonebottom

Care Guide

Diet

Polystictus Corydoras are omnivores that thrive on a varied diet of sinking pellets, frozen foods (bloodworms, brine shrimp, daphnia), and live foods. Feed small amounts once daily, only what they can consume in 2-3 minutes. They are active foragers and will scavenge the substrate for leftover food and organic matter.

Behavior

These are peaceful, active bottom-dwellers that spend most of their time foraging along the substrate with their barbels. They are highly social and must be kept in groups of at least 6 individuals to exhibit natural schooling behavior and reduce stress. They are nocturnal to crepuscular and are most active during dawn, dusk, and nighttime hours.

Breeding

Breeding Polystictus Corydoras in captivity is difficult and rarely achieved in home aquariums. They require specific water conditions, cooler temperatures (around 20-22°C), and a well-established planted tank with soft substrate. Successful spawning is uncommon, and fry rearing requires specialized care and live foods.

Tank Mates

Neon Tetra

Similar water parameters and peaceful temperament; occupy mid-water column

excellent

Rummy Nose Tetra

Compatible water conditions and peaceful schooling behavior

excellent

Otocinclus

Peaceful algae eater; shares bottom zone without aggression

excellent

Dwarf Gourami

Peaceful and compatible; prefers upper water column

good

Red Cherry Shrimp

Peaceful invertebrate; may predate on fry but safe with adults

good

Anubias Nana

Hardy plant that won't be uprooted; provides shelter and cover

excellent

Common Diseases

Ich (Ichthyophthirius multifiliis)

Symptoms

White spots on body and fins, rapid breathing, lethargy, rubbing against substrate

Treatment

Raise temperature gradually to 28-29°C, perform daily water changes, use aquarium salt (1 tsp per gallon) or commercial ich treatment; treat for 7-10 days

Fin Rot

Symptoms

Frayed or deteriorating fins, discoloration at fin edges, lethargy

Treatment

Improve water quality with frequent water changes, remove decaying food, use antibiotic treatment if severe; ensure adequate substrate for barbel health

Barbel Erosion

Symptoms

Shortened or missing barbels, difficulty foraging, behavioral changes

Treatment

Use fine sand substrate (not gravel), maintain excellent water quality, ensure proper nutrition; condition is often irreversible but prevents further damage

Dropsy

Symptoms

Bloated appearance, pinecone-like scales, lethargy, loss of appetite

Treatment

Isolate affected fish, perform frequent water changes, provide high-quality foods; condition is often fatal; prevent through good water quality and nutrition