Pepper Corydoras
Corydoras paleatus
Min Tank Size
60L
Adult Size
7.5 cm
Lifespan
10 years
School Size
6+
About
Native to the La Plata river basin in southeastern South America, Corydoras paleatus is one of the most forgiving and widely available corydoras in the hobby. Their coloration is a mosaic of dark olive-green and black blotches scattered over a pale silvery-cream body, giving them a speckled, almost marbled look that becomes more defined as they mature. Males stay slightly smaller and slimmer, while females fill out noticeably when in spawning condition.
They're genuinely tough fish. Pepper cories handle a wider temperature window than almost any other commonly kept tropical fish, tolerating conditions down to around 18°C without complaint, which makes them compatible with species like white cloud mountain minnows or even goldfish setups that run cooler. Water chemistry flexibility is equally impressive. Soft, slightly acidic water is what they evolved in, but they adapt readily to neutral or moderately hard tap water without issue.
Fine-grained substrate is non-negotiable. Their barbels are sensory organs they use constantly to sift through substrate hunting for food scraps and invertebrates. Coarse gravel grinds these down over time, and once damaged, barbels don't fully recover. A soft sand bottom keeps them healthy and lets you watch their natural digging behavior.
Diet is easy. They'll eat sinking wafers, small pellets, frozen bloodworm, tubifex, and whatever sinks past the midwater fish above. They're not picky.
Keep a group of at least six and you'll see them move through the tank together, investigating every corner with infectious curiosity. Browse real community builds featuring these fish and you'll quickly understand why they've been a staple of the hobby for over a century.
Water Parameters
Temperature
°CpH
GH
dGHKH
dKHSwimming Level
Flow Preference
Keeping multiple Pepper Corydoras together
Pepper Corydoras are shoaling fish and need company of their own kind. Keep a group of at least 6. Smaller groups leave them stressed, washed-out in color, and prone to hiding.
Compatibility
These are genuinely universal community fish. They pair well with small tetras like neons, cardinals, and rummy noses, as well as rasboras, danios, livebearers, and dwarf cichlids like apistogrammas. Avoid housing them with large cichlids or any fish with a mouth big enough to swallow them whole. Pairing with aggressive fin nippers isn't a concern since cories have no flowing fins to target. Their cold-tolerance makes them a rare fit for cooler setups with white clouds or hillstream loaches. Larger shrimp like amanos coexist fine, but small neocaridina shrimp may occasionally get snapped at during feeding, especially juveniles.
Commonly kept with
Species this one is most often paired withCommonly tried but avoid
Often paired, but shouldn't beCare Notes
The single most common beginner mistake is keeping them on gravel. It looks fine for a while, but the barbels quietly erode and the fish become susceptible to bacterial infections that are hard to treat. Sand is the fix, not medication. The second mistake is keeping too few. A lone cory or a pair will hide constantly and show stress behaviors. Six is the floor, and eight to ten brings out their full personality. They do need good water quality despite their reputation for toughness. Dirty substrate accumulates waste right where they feed, so regular vacuuming matters more than with midwater fish.
Behavior & Aggression
Pepper cories are about as non-aggressive as fish get. They show no meaningful territorial behavior and don't bother tankmates under any normal circumstances. Even during spawning, aggression doesn't factor in. Males will chase females energetically, but this is courtship, not combat. The only time these fish come close to conflict is when food hits the bottom and multiple cories converge on the same spot, which amounts to nothing more than a brief scramble before they disperse.
Things to Know
- Barbels erode in dirty substrate, use fine sand only
- Groups of 6+ are the minimum, they do better in 8-10
- Can tolerate cooler temps than most tropical fish, avoid pairing with high-heat species
- Will breed readily, eggs scattered on glass and plants
- Requires soft sand to protect sensitive barbels.
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