Paracheirodon axelrodi
A deeper, fuller red than the neon tetra — the red stripe runs the full length of the body. A school of cardinals over green plants is hard to beat. Keep eight or more in a mature, planted tank. Soft, slightly acidic water at 24–29 °C. Sample photo: “Cardinal Paracheirodon axelrodi (1)” by CHUCAO, CC BY-SA 3.0, via Wikimedia Commons. Sample photo: “Paracheirodon axelrodi 2” by Paolo Neo, Public domain, via Wikimedia Commons. Sample photo: “Cardinal Paracheirodon axelrodi (2)” by CHUCAO, CC BY-SA 3.0, via Wikimedia Commons.
Schooling fish; keep 8 or more in soft, slightly acidic water. Prefers warmer water than neon tetras.
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