Description

Diamond Tetra (Moenkhausia pittieri)

Species Background
Diamond Tetras originate from Lake Valencia and connected drainages in northern Venezuela. These waters are warm and mineralized. Nearly all specimens in the aquarium trade are tank-bred, and decades of captive breeding have produced fish that adapt well to a wide range of stable home aquarium conditions.

Behavior and Temperament
Diamond Tetras are peaceful midwater schooling fish. A minimum group of six is required, though groups of 8–12 display stronger coloration and more confident behavior. Males may posture and flare during breeding condition, but this behavior is brief and non-injurious.

They coexist well with other peaceful community species including rasboras, Corydoras, dwarf cichlids, livebearers, and similarly sized tetras. They are active without being frantic and spend most of the day cruising open water.

Adult Size
Adults typically reach 2–2.5 inches in length.

Water Parameters
Temperature: 74–82°F (ideal 76–80°F)
pH: 6.0–8.0
GH: 4–20 dGH
KH: 2–14 dKH

Stability is prioritized over chasing exact numbers.

Diet
Omnivorous. A quality micro-pellet or fine flake should form the dietary base. Supplement regularly with frozen or live foods such as brine shrimp, daphnia, and bloodworms to enhance coloration and conditioning.

Tank Requirements
Minimum tank size: 20 gallons.
Provide open swimming space with plant cover along the perimeter. Dark substrate and subdued lighting intensify their iridescent scaling. Moderate filtration is sufficient; excessive current is unnecessary.

Why They’re Popular
Aquarists enjoy them for their metallic, diamond-like iridescence that develops fully in mature males. They are hardy, adaptable, peaceful, and visually striking when maintained in proper schools, making them reliable centerpiece schooling fish in community aquariums.