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The Green Neon Tetra (Paracheirodon simulans) is a captivating and lesser-known cousin to the popular Neon and Cardinal Tetras, offering a subtly different yet equally stunning display in the community aquarium. Hailing from the dark, acidic waters of the Rio Negro and its tributaries in South America, this small characin typically reaches a maximum size of just 1 inch (2.5 cm). Its most striking feature is a vibrant, iridescent blue-green lateral stripe that runs from its eye to the base of its tail, often appearing more blue than green depending on lighting and mood, contrasting beautifully with a translucent body. Unlike its famous relatives, the red coloration is often minimal or absent, making its namesake green stripe the focal point. These incredibly peaceful and social fish thrive in well-established planted aquariums, where their schooling behavior can be observed in full glory. A minimum tank size of 10 gallons is recommended for a school of 6-8 individuals, but larger tanks will allow for a more impressive display with a larger school. They prefer soft, acidic water (pH 5.0-6.5, GH 1-5 dGH, KH 0-3 dKH) with temperatures between 72-79°F (22-26°C). Mimicking their natural blackwater habitat with leaf litter, driftwood, and dim lighting will bring out their best colors and reduce stress. Dense planting, especially with fine-leaved plants like Java Moss or Rotala, provides security and resting spots. Green Neon Tetras are omnivorous and will readily accept a variety of small, high-quality foods, including micro-pellets, crushed flakes, and live or frozen daphnia, brine shrimp, and bloodworms. Due to their small mouths, food size is crucial. They are excellent candidates for a tranquil community tank alongside other peaceful, similarly sized fish such as Dwarf Rasboras, Otocinclus catfish, small Corydoras, and other tetras. Avoid housing them with large or aggressive species that might see them as prey. With proper care and stable water conditions, these enchanting little fish will add a shimmering jewel-like quality to your aquatic scape.

Smaller cousin of the Neon Tetra.