
Polystictus Corydoras
Hoplisoma polystictum
- Care level
- Intermediate
- Adult size
- 3.5–5 cm
- Minimum tank
- 60 litres
- Temperature
- 22–27 °C
Species profile
Hoplisoma paleatum
Common names: Peppered Corydoras, Peppered Cory, Pepper Corydoras

Peppered Corydoras is a peaceful South American callichthyid catfish recognised by a grey, olive, and brown body covered with irregular peppered marbling. It should be kept in a same-species group over fine sand in clean, oxygen-rich freshwater.
The Peppered Corydoras has a pale silver to olive body covered in irregular dark marbling and pepper-like spots. Males often show a taller dorsal fin, while overall contrast varies greatly between domestic lines and individual fish.
Identify this profile by the combination of a grey, olive, and brown body covered with irregular peppered marbling. Older sources commonly list this fish as Corydoras paleatus; the current profile follows the accepted or revised placement Hoplisoma paleatum. Colour alone can be unreliable in stressed, juvenile, or poorly conditioned fish, so body shape, snout length, fin pattern, and provenance should also be checked.
Mature females are usually larger and deeper-bodied, while males remain slimmer and may develop a taller, more pointed dorsal fin. Young fish are difficult to sex with confidence.
Keep a social group over smooth sand with shaded cover, open foraging space and well-oxygenated water. This species is comfortable in cooler community conditions than many tropical corys, so long-term excessive warmth and low oxygen should be avoided.
A peaceful, social bottom forager that is usually confident in a proper group. It spends much of the day searching for food and resting with companions, but it does not live on waste or clean the aquarium.
Keep at least 6 of the same species or coded population, with 8 or more preferred where space permits. A mixed collection of single corys does not fully replace a proper same-species group.
It is not territorial. Males may briefly chase one another or follow females during courtship, but sustained aggression is unusual when the group has adequate floor space.
Best with peaceful fish that suit clean, well-oxygenated and moderately cool community conditions. Avoid aggressive cichlids, large predators and warm-water combinations that force the Panda Corydoras into unsuitable long-term conditions.
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Xilong XL-803D canister filter – up to 100 LAn external-filter option for the moderate-flow setup described above. The seller lists a 400 L/h pump and an aquarium capacity of up to 100 litres.
Check the volume of your actual aquarium and the needs of its complete stocking. Use the flow control or spray bar to avoid a concentrated current. A larger tank or a species requiring strong river flow needs a different filter selection.
Cut-to-fit aquarium filter media padA cut-to-fit pad for compatible filter compartments. The listing describes a sheet approximately 16 by 12 inches; check the offered variant and the space inside your filter.
The seller description varies between five and eight layers, so confirm the actual sheet before ordering. Keep the filter manufacturer’s media arrangement and avoid obstructing the flow.
Xinyou ceramic filter rings – 300 gA biological-media option for a filter with a suitable media basket. This listing is a 300 g pack of ceramic rings.
Check the ring size and available basket space. Installing new media does not make a new aquarium instantly cycled, and these rings do not replace routine water-quality checks.
A cool to moderately warm range is preferred. The fish can tolerate varied mineral content when changes are gradual and water remains clean and oxygenated.
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Manual aquarium siphon and gravel cleanerA manual siphon for routine aquarium water changes and accessible waste removal. The seller lists a hose approximately 1.6 m long.
Control the flow and keep the intake clear of fish and delicate planting. Clean the areas appropriate for your substrate and layout rather than disturbing the entire planted bed.
Use quality sinking pellets or tablets as the staple, with varied frozen or live invertebrate foods and some plant-based ingredients. Target-feed the group and remove excess food rather than treating the fish as scavengers.
Feed after faster surface and midwater fish have taken their share, and confirm that every individual reaches food. Use small portions once or twice daily, remove persistent leftovers, and vary prepared and frozen or live foods.
Peppered Corydoras are commonly bred. A cool water change often stimulates conditioned adults, after which the female attaches fertilised eggs to glass, plants or decor; remove or protect the eggs because the adults provide no care.
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