Easy
L001 Glyptoperichthys joselimae
23–28°C · pH 6–7.5 · 400L
£16.99
Corydoras duplicareus, the Duplicat Cory Catfish, is a peaceful masked schooling catfish for planted community aquariums. Keep in groups of 6+ over soft sand at 24-28C. Healthy UK stock with secure live-arrival packing.
Adult size is the maximum length this species reaches at full maturity (scientific sources). The livestock you receive will be younger and smaller — pick a size variant above for the actual shipping size. Photos are AI-enhanced, so the animal may show subtle colour or marking differences.
Corydoras duplicareus
Duplicat Corydoras are a shoaling species — they need 6+ to feel safe and show their full colour.
Corydoras duplicareus, the Duplicat Cory Catfish, is a peaceful masked schooling catfish for planted community aquariums. Keep in groups of 6+ over soft sand at 24-28C. Healthy UK stock with secure live-arrival packing.
Adult size is the maximum length this species reaches at full maturity (scientific sources). The livestock you receive will be younger and smaller — pick a size variant above for the actual shipping size. Photos are AI-enhanced, so the animal may show subtle colour or marking differences.
Corydoras catfish are the perfect bottom-dwelling cleanup crew for any community tank. Peaceful, hardy, and endlessly entertaining to watch. Order for UK delivery.
Maintain these water conditions for optimal health and vibrant colors
If you want a small, active, genuinely useful bottom-dweller for a peaceful tropical aquarium, Corydoras duplicareus is one of the smartest choices in catfish UK fishkeeping. Often called the Duplicat Cory Catfish or Duplicat Cory, this striking South American species combines the classic corydoras shape with a bold dark eye mask, warm golden body tone, and the sociable nature that makes corys so popular in community fish UK setups. Adult Corydoras duplicareus reach around 6 cm, thrive in groups, and can live up to 10 years when given stable water quality, a soft substrate, and a well-run aquarium. Their peaceful nature, manageable Corydoras duplicareus tank size, and engaging group behaviour make them especially appealing for aquarists building a planted community display.
This is not a fish for rough gravel or solitary keeping. The best results come when a soft sandy floor is treated as essential rather than optional, because these fish constantly sift the bottom with their sensitive barbels. In a Corydoras duplicareus planted aquarium with shaded areas, leaf-litter style decor, and open feeding zones, the species looks superb and behaves naturally. For aquarists searching for freshwater catfish UK stock that is peaceful, social, and visually distinctive, this is a rewarding balance of beauty, behaviour, and long-term compatibility.
For a wider overview of the genus, including general husbandry that applies to every species, see our Corydoras care guide.
Corydoras duplicareus belongs to the armoured catfish family, a group valued in aquariums for its peaceful nature, bottom-feeding habits, and social behaviour. It is closely related to other popular corys such as Corydoras metae, Corydoras venezuelanus, and Corydoras sterbai. The species is especially well known for its close resemblance to Corydoras adolfoi, which is why hobbyists frequently compare Corydoras duplicareus vs adolfoi before buying.
The Corydoras duplicareus habitat lies in tropical South American freshwater systems of the upper Rio Negro region, where these fish live in calm or gently flowing waters with soft bottoms, submerged roots, and plenty of organic debris. In nature they spend much of their time searching the substrate for tiny insect larvae, worms, plant matter, and biofilm. That natural feeding style explains why the species does best in aquariums with fine sand, scattered cover, and a mature biological system rather than a bare, sterile setup.
The aim in the aquarium is to recreate a warm, slightly acidic to neutral environment with a soft floor and diffuse light. A group kept over sand with driftwood and broad-leaved plants will show more confidence and more natural foraging. This is one reason a Corydoras duplicareus planted aquarium is so successful: plants break lines of sight, soften light, and support the microfauna the fish naturally graze on.
The minimum Corydoras duplicareus tank size is 60 litres, but that should be viewed as a starting point for a small group. Because this is a schooling species, a better long-term choice is 75-90 litres if you want 6-10 fish with room for tank mates. Their bioload is moderate, but they are active across the bottom and need floor space more than height. As a schooling catfish for community tank use, they should never be kept singly or in pairs.
The ideal Corydoras duplicareus water parameters are stable rather than extreme. Aim for a Corydoras duplicareus temperature of 24-28°C, with a practical temperature range centred around 25-26°C for everyday care. The preferred Corydoras duplicareus pH range is 6.0-7.5, and Corydoras duplicareus water hardness should stay between 2 and 15 dGH. They adapt to slightly varied conditions, but sudden swings are far more dangerous than being slightly above or below the midpoint.
Use a mature internal or external filter that gives steady turnover without blasting the substrate. Corydoras appreciate clean water and good oxygen levels, but they do not enjoy being pinned into one corner by excessive current. A spray bar, sponge pre-filter, or flow directed along the back glass works well. This matters most in a Corydoras duplicareus community tank where feeding leftovers can collect at the bottom.
Yes. A soft Corydoras duplicareus sand substrate is one of the most important care points. Fine, rounded sand to a depth of around 2-4 cm protects the barbels and allows natural sifting behaviour. Sharp gravel can wear down barbels, trap waste, and stop the fish from feeding naturally. Choosing sand from day one gives them the best chance to settle quickly.
A Corydoras duplicareus planted aquarium works extremely well with Amazon swords, Cryptocoryne, Java fern, floating plants, and driftwood. Keep some open sand at the front for feeding and foraging. Leaf-litter botanicals add a natural look. Although these corys are not algae eaters, they benefit from mature surfaces rich in microorganisms. For hobbyists comparing options, this fish is among the best Corydoras species for aquarium displays where calm behaviour and elegant patterning matter.
Always cycle the tank for 4-6 weeks before adding Corydoras duplicareus. These fish are far more likely to thrive in a mature aquarium with stable bacteria, low ammonia, and established feeding surfaces.
The Corydoras duplicareus diet is omnivorous, which means they need both protein-rich foods and some plant-based content. In the wild they pick through the substrate for tiny invertebrates, detritus, and edible organic matter. In the aquarium they should never be expected to survive on scraps from upper-level fish. A proper Corydoras duplicareus feeding guide includes targeted sinking foods given after the lights dim slightly, or once midwater fish have been distracted.
Use quality sinking catfish pellets, soft wafers, and small granules that reach the bottom quickly. These should form the core of the diet 5-6 days per week. Corys are scavengers, but they are not waste disposals and need their own dedicated food.
Offer frozen or live bloodworm, daphnia, mosquito larvae, and brine shrimp 2-3 times per week. These foods help maintain body condition and are very useful when conditioning adults for Corydoras duplicareus breeding. A varied diet also supports colour and activity.
Blackworm, finely chopped tubifex from a safe source, and high-protein gel foods can be used sparingly. When comparing Corydoras duplicareus vs otocinclus, remember that otocinclus rely much more on algae and biofilm, while Corydoras duplicareus need a richer, more mixed feeding plan.
Feed once or twice daily in portions the group can clear within 2-3 minutes. In a busy community fish UK aquarium, it often helps to split feeding into morning and evening so shy bottom fish get their share.
| Time | Food | Amount |
|---|---|---|
| Morning | Sinking micro pellets or wafers | Small portion for full group |
| Evening | Frozen bloodworm, daphnia, or brine shrimp | What they finish in 2-3 minutes |
Overfeeding causes ammonia spikes, dirty substrate, and oxygen loss at the bottom of the tank. Remove uneaten food promptly, especially in warm water where waste breaks down fast.
Corydoras duplicareus size tops out at around 6 cm, giving the fish a compact, robust look typical of corydoras. The body is pale gold to creamy beige, overlaid with a dark dorsal saddle and a bold black mask through the eye. This pattern is the reason many aquarists searching Corydoras duplicareus for sale UK become interested in the species in the first place: it is eye-catching without looking artificial.
The contrast shows best when the fish are kept over dark decor with open sand in front. Look for a healthy body shape, neat fin edges, and the clean facial marking that defines this species. In a settled group, the warm body tone deepens, making this a genuinely stunning Duplicat Cory Catfish for display tanks.
Females are usually a little broader and fuller-bodied when viewed from above, especially when mature and carrying eggs. Males tend to be slimmer. There are no major colour morphs in the trade compared with forms like Corydoras panda or long-fin domestic strains; the wild-type pattern is exactly why many keepers prefer them. If you want a display that looks refined rather than overbred, this species stands out as a very attractive peaceful bottom dweller UK option.
Corydoras duplicareus tank mates should be chosen with one rule in mind: peaceful always beats flashy. This is a peaceful Duplicat Cory that thrives in calm communities with other non-aggressive fish that will not outcompete it at feeding time. Because they are a true schooling catfish for community tank use, they should first be kept in their own group of at least 6, ideally 8 or more. Once that social need is met, they mix well with small tetras, rasboras, pencilfish, peaceful dwarf cichlids, and other gentle species.
Good companions include other peaceful corys such as Corydoras metae, Corydoras venezuelanus, and Corydoras aeneus. If you enjoy comparing species, many aquarists weigh Corydoras duplicareus vs Corydoras aeneus, Corydoras duplicareus vs Corydoras sterbai, and Corydoras duplicareus vs Corydoras paleatus when planning a mixed cory collection. For a more specialist bottom community, Farlowella acus can also work in larger, mature aquariums because it occupies a different niche and is similarly peaceful.
Avoid large boisterous barbs, aggressive cichlids, fin-nipping species, and any fish big enough to bully or swallow them. Also avoid housing them with rough substrate dwellers that constantly disturb the bottom, and any predatory catfish.
In a 60-litre aquarium, a sensible plan is 6 Corydoras duplicareus with a small shoal of peaceful upper-level fish. In 90 litres, 8 Corydoras duplicareus with a tetra group and a few calm surface fish works well. This makes them one of the best Corydoras species for community tank layouts where movement is spread across all levels.
Adult shrimp and most snails are usually safe, though very small shrimplets may be eaten opportunistically. Because this species is a peaceful bottom dweller UK favourite, it is often used in planted tanks with nerites and Amano shrimp.
| Species | Compatible? | Notes |
|---|---|---|
| Corydoras metae | Yes | Peaceful, with similar care needs in larger cory communities |
| Corydoras sterbai | Yes | Warm-water cory option with comparable temperament |
| Large aggressive cichlids | Avoid | Stress, injury, and feeding competition are likely |
Always quarantine new arrivals for 2-4 weeks before adding them to a cory group. Corydoras are social, but they can be sensitive to parasites introduced by apparently healthy new fish.
Corydoras duplicareus breeding is achievable for prepared aquarists, though it is better described as moderate than easy. This species is not the hardest cory to spawn, but success depends on conditioning, clean water, and getting the triggers right. Everyday care suits Corydoras duplicareus for beginners, but breeding is a step up from basic maintenance.
Use a separate 40-60 litre breeding tank with fine sand or a bare bottom, a sponge filter, and broad-leaved plants or spawning mops. Condition the adults heavily with live and frozen foods. Keep water very clean and slightly cooler during trigger changes.
Like many corys, they often respond to large cool water changes that mimic rainfall. Males become more active, females look fuller, and the fish may begin the classic cory T-position during spawning. Eggs are usually placed on glass, plant leaves, or smooth decor.
Remove eggs or adults once spawning is complete to prevent predation. Gentle aeration and very clean water are important. Many breeders add mild antifungal measures, but cleanliness is the main defence. Eggs usually hatch within several days depending on temperature.
Feed newly free-swimming fry with infusoria, powdered fry food, microworms, and then newly hatched brine shrimp. Keep the bottom spotless and perform small frequent water changes. Growth is steady rather than rapid.
The biggest problems are infertile eggs, fungus, and weak fry caused by poor conditioning. Consistent conditioning and stable water quality are the real answers.
For best hatch rates, condition adults at the upper end of the normal temperature range, then trigger spawning with a substantial cooler water change and increased oxygenation. This often produces a stronger response than food alone.
Comparison matters because many cory species look similar at first glance but differ in temperature preference, pattern, and ideal role in a community. Corydoras duplicareus vs adolfoi is the classic comparison, but aquarists also ask about Corydoras duplicareus vs Corydoras sterbai, Corydoras duplicareus vs Corydoras aeneus, and Corydoras duplicareus vs Corydoras paleatus.
| Feature | Corydoras duplicareus | Corydoras adolfoi |
|---|---|---|
| Max Size | Around 6 cm | About 5.5-6 cm |
| Care Level | Intermediate | Intermediate |
| Temperature | 24-28°C | 24-28°C |
| Pattern | Black mask and dorsal saddle, wider saddle than adolfoi | Black mask and saddle, narrower saddle band |
| Best For | Warm, peaceful community tanks | Collectors wanting a close lookalike species |
| Feature | Corydoras duplicareus | Corydoras sterbai |
|---|---|---|
| Pattern | Mask and saddle | Spotted body with striped fins |
| Water Preference | Warm, soft to moderate | Warm, adaptable |
| Best For | Natural South American themes | Bold contrast in mixed tropical tanks |
| Beginner Appeal | Good with proper setup | Often considered slightly easier |
Choose Corydoras duplicareus if you want a refined, natural-looking cory with warm-water preferences and a very peaceful temperament. For a more domestic, decorative line, compare Corydoras aeneus long-fin strains; for a cooler-tolerant, more unusual look, compare Corydoras paleatus. For many aquarists, though, the Duplicat Cory Catfish remains one of the best Corydoras species for aquarium displays because of its elegant pattern and calm social behaviour.
Healthy Corydoras duplicareus are alert, active in groups, and eager to forage. Their barbels should be intact, the belly gently rounded rather than sunken, and the fins open and clean. When problems arise, they are usually linked to poor substrate, dirty water, stress, or sudden changes in chemistry.
Barbel erosion is one of the most common problems and is strongly tied to rough gravel or dirty substrate. Bacterial infections, fungal growth on injuries, and external parasites can also occur, especially after transport or poor quarantine. Because these are sensitive armoured catfish, medications should be used carefully and dosed accurately.
Prevention is better than cure: use sand, keep nitrate low, vacuum waste gently, and feed a varied omnivorous diet. Quarantine all new fish. If treatment is needed, move affected fish to a hospital tank where possible and avoid strong medications unless the diagnosis is clear. Long-term health depends far more on setup quality than on initial purchase price.
Never use medications casually in a mixed aquarium. Corydoras can react badly to overdosing, and copper-based treatments are especially risky in tanks that also contain shrimp or sensitive invertebrates.
Corydoras duplicareus behaviour is one of the species' biggest selling points. They are social, inquisitive, and often surprisingly active during the day once settled. In a proper group they move together across the substrate, pause to sift sand, and make short dashes to the surface for air as part of normal cory physiology.
This species is not aggressive or territorial in the usual sense. Instead, confidence comes from numbers. A lone fish will often hide, while a group of 6-10 behaves like a true shoal and becomes much more visible. That is why a Corydoras duplicareus community tank only works when social needs are respected.
To encourage natural behaviour, keep lighting moderate, provide cover along the edges, and leave open feeding areas at the front. In a mature planted tank they quickly become one of the most enjoyable corydoras UK fish to watch. This balance of activity and gentleness is exactly what makes the Duplicat Cory Catfish special.
When you order corydoras UK livestock, condition matters more than labels. Our Corydoras duplicareus are selected for clear mask pattern, full body shape, intact barbels, and active group behaviour before listing. We hold them in appropriate warm water, feed them targeted sinking foods, and watch how they settle in groups so they arrive as confident aquarium fish rather than stressed imports.
Each batch is observed through a quarantine and assessment period, with close attention paid to barbel condition, respiration, and feeding response. Because this species is often bought for display communities, we focus on acclimation to typical indoor tropical catfish UK conditions rather than rushing fish out immediately. Orders are packed in insulated boxes, with heat packs in cold weather and secure bagging designed to reduce movement and temperature shock during transit. Tracked delivery is used so livestock spend as little time in the box as possible.
Whether you are researching where to buy Corydoras duplicareus UK, comparing Corydoras duplicareus for sale UK options, or simply looking for honest care information, the goal is straightforward: healthy fish and practical guidance on acclimation, group size, and feeding so your new arrivals have the best chance of long-term success. Order your Corydoras duplicareus today and build a peaceful, active bottom-level group that transforms the whole aquarium.
To build a stronger cory collection or a balanced peaceful community, consider a few related options. Corydoras metae offers another elegant masked cory for South American themes, while Corydoras venezuelanus adds a different body tone and shape to mixed cory displays. If you want contrast, Corydoras sterbai brings a brighter, more unusual look for warm tropical tanks. In larger mature aquariums, Farlowella acus complements corys as a calm specialist wood-grazing species. You can also compare body form and community suitability with Corydoras aeneus and Corydoras paleatus.
23–28°C · pH 6–7.5 · 400L
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