Family: Characidae Distribution: Paraguay and Brazil are the homelands of Hyphessobrycon herbertaxelrodi. The Black Neon Tetra can be found in the Paraguay, Taguary and Amazon River systems. PH: 6.0 – 7.5 pH Temperature: 23 – 27 °C (73 – 81 °F) Hardness: 1 – 7 dH Description: An average-sized Hyphessobrycon (4.5cm), The Black Neon Tetra [...]