Panda Cory vs Pygmy Cory Comparison Guide: Bottom Dweller Pick
Both species hit Singapore shops as “small corys” and beginners often grab whichever bag looks fuller. The panda cory vs pygmy cory decision actually matters because one schools mid-water like a tetra and the other does the classic substrate-shuffling cory thing. This guide from Gensou Aquascaping at 5 Everton Park lays out the differences so you do not buy the wrong fish for your aquascape.
Quick Verdict
Pick panda cory if you want a classic substrate-cleaning bottom dweller in a 60-litre planted tank with sand. Pick pygmy cory if you want a tiny mid-water schooling cory for a heavily planted nano under 40 litres where space and bioload are tight.
Panda Cory: The Classic Bottom Dweller
The panda cory (Corydoras panda) tops out at 4-5cm with the trademark white body, black eye-mask and black tail patch. They are obligate sand-sifters — gravel substrates wear down their barbels and lead to chronic infections. Group of six minimum, eight or more preferred. Water tolerance: pH 6.0-7.5, temperature 22-26°C. Note that 26°C is the upper edge for them; Singapore ambient summers above 30°C stress this species, so a chiller or aggressive fan setup is sensible for a dedicated tank.
Pygmy Cory: The Schooling Outlier
The pygmy cory (Corydoras pygmaeus) is one of the smallest catfish in the hobby at 2-2.5cm. Unlike most corys, they spend more than half their day mid-water, schooling in tight clusters like rasboras. This makes them perfect for nano scapes where you want bottom presence without sacrificing the open water layer. Group of eight minimum, ideally 12+ for the schooling display. They tolerate pH 6.4-7.4 and 22-26°C, and the smaller body mass handles Singapore’s warmer ambient slightly better than pandas.
Side-by-Side Spec Comparison
Size: panda 5cm versus pygmy 2.5cm — a 4x difference in body mass that drives stocking maths. Minimum tank: panda needs 60 litres, pygmy 30 litres. Substrate: panda demands fine sand, pygmy is forgiving of fine gravel because it spends less time digging. Schooling behaviour: pandas loosely group and forage individually, pygmies tight-school like tetras. Bioload: panda significant, pygmy negligible. Price: panda SGD 4-8 each, pygmy SGD 6-12 each because pygmies are imported less frequently.
Decision Framework
If your tank is under 40 litres, pygmy is the only viable choice — pandas need more swimming and foraging space. If your substrate is gravel and you do not want to redo the scape, pygmy is more forgiving. If you want visible activity across all three water layers in a nano, pygmy delivers the schooling display from mid-water. If you have a 60-litre+ planted tank with sand and want classic cory behaviour (barbel-flicking, glass-shuffling, group cuddle-piles in shaded corners), panda is the right pick.
Singapore Sourcing and Pricing
Iwarna and Polyart carry both species year-round. Shop-grade pandas run SGD 4-8, with quality Czech-bred or Singaporean tank-bred stock at SGD 8-12. Pygmy cory shipments are less reliable — Iwarna gets them every 6-8 weeks at SGD 6-12, occasionally hitting SGD 15 when import gaps appear. C328 Clementi sometimes stocks both. Pair them with sand from the decoration and substrate range and a gentle filter that will not vacuum the smaller species.
Common Mistakes
Buying three or four corys is the most common error — both species are obligate schoolers and singletons stress out, hide constantly and refuse food. The second mistake is keeping pandas on sharp gravel; expect barbel erosion within months. Third: assuming pygmies will fit a community of large tetras and rams — they get eaten or harassed. Stock pygmies only with peaceful nano fish like chili rasboras, ember tetras or shrimp.
Tank Mate Compatibility
Pandas pair beautifully with rasboras, tetras, dwarf cichlids and cherry shrimp in 60-litre+ tanks. Pygmies belong with the smallest community species — chili rasboras, sparkling gouramis, ember tetras and dwarf shrimp. Avoid both with angelfish, larger gouramis or any cichlid above 8cm. Avoid mixing the two cory species in one tank: pandas tend to muscle pygmies off feeding zones, and the size disparity creates feeding stress.
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