Violet Corydoras
Violet Corydoras (Corydoras similis) is named for the subtle violet-blue iridescent sheen that catches the light across the pale body — a delicate but distinctive coloration that sets this species apart from more boldly patterned relatives. A small dark blotch near the dorsal fin and a smudge at the tail base add to the pattern.
Feeding & Care Tip: Hikari Sinking Wafers make an excellent daily staple and Sera Vipachips Tropical Wafers are an excellent alternative. Supplement 2–3× per week with Hikari Frozen or Freeze-Dried Tubifex Worms, Hikari Frozen or Freeze-Dried Baby Brine Shrimp. Feed near the substrate at or after lights-out when corydoras are most active.
Native to Colombia (Rio Meta drainage). In the aquarium, soft to medium, slightly acidic to neutral water with fine sand substrate, gentle filtration, and shaded areas created by driftwood or plants replicates the natural habitat and produces the most active, healthy behavior.
Keep in groups of at least six — this is not optional for Corydoras. In the wild these fish occur in schools of dozens to hundreds. A lone Corydoras or a group of fewer than six is a stressed fish that stays hidden, refuses food, and lives a shortened life. In a proper group they are bold, constantly active, and endlessly entertaining to watch as they forage together across the bottom of the aquarium.
Corydoras are highly sensitive to substrate quality — fine sand is strongly preferred over gravel, as rough substrates damage the delicate barbels they use to forage. Regular partial water changes and pristine water quality are essential, as all Corydoras are sensitive to nitrites and dissolved waste. Sand substrate, gentle flow, and shaded areas with driftwood or plants will keep this species at its happiest and most active.
Care & Ideal Parameters
| Difficulty | Easy |
| Temperament | Peaceful — Community |
| Typical Adult Size | 2.4 inches (6 cm) |
| Min. Group Size | 6 minimum — groups of 8+ for best activity |
| Ideal Temp | 68–81°F (20–27°C) |
| Ideal pH | 6.0–7.0 |
| Ideal GH | 0–15 dGH |
| Ideal KH | 0–10 dKH |
| Staple Food | Hikari Sinking Wafers; Sera Vipachips Tropical Wafers |
| Treat / Supplement | Hikari Frozen or Freeze-Dried Tubifex Worms, Hikari Frozen or Freeze-Dried Baby Brine Shrimp |
| Origin | Colombia (Rio Meta drainage) |
| Notes | Subtle violet-blue iridescent sheen is the defining feature. Small dorsal and tail spots. Colombia origin. Similis means 'resembling.' Sand substrate essential. |
