Pink Tail Chalceus

The Pinktail Chalceus (Chalceus macrolepidotus) is a large, fast-swimming, silver fish known for its bright pink tail, native to South American rivers. It's an active, predatory, top-dwelling fish that needs a large, well-covered aquarium to prevent jumping, and should be kept in groups to prevent aggression, with tank mates of similar size. They require a high-protein diet.

Appearance and behavior

• Appearance: Shimmering silver body with a striking pink tail.

• Size: Can grow up to 10-12 inches long.

• Temperament: Active, fast, and skittish; prone to jumping when startled.

• Habitat: Top-dwellers in fast-flowing, well-oxygenated waters. 

Aquarium requirements

• Tank Size: Minimum 75 gallons for a single fish, but much larger tanks (100+ gallons) are recommended for groups. 

• Lid: A tight-fitting lid is essential to prevent escapes. 

• Environment: Needs plenty of open swimming space and hiding spots. 

• Water: Prefers slightly acidic to neutral water (pH 6.5-7.5) with good filtration and flow. 

Diet and tank mates

• Diet: Carnivorous; eats pellets, flakes, and live/frozen foods like insects, worms, and small fish. 

• Tank Mates: Best with other large, robust fish like Silver Dollars, large Barbs, or Cichlids. Avoid smaller fish that can be eaten. 

• Social: Should be kept in groups of 6 or more to prevent fighting, but will still squabble, so a large tank is crucial.