Beckfords Red Pencilfish – Cuboid Nature Aquarium

Beckfords Red Pencilfish

Beckfords Red Pencilfish(Nannostomus beckfordi) is the hardiest and most adaptable pencilfish — named for G.C. Beckford who collected the type specimens. The body displays a vivid red-orange lateral stripe on gold to silver background, with black fin markings in males. The best entry point into the Nannostomus genus.

Feeding & Care Tip:Hikari Micro Pellets(crushed or soaked briefly) andSera Vipan Babymake excellent daily staples. Supplement 2–3× per week withHikari Frozen or Freeze-Dried Baby Brine ShrimpandHikari Frozen Daphnia. Pencilfish are slow, deliberate feeders — avoid fast tankmates that will outcompete them. Feed small amounts 2–3 times daily.

AllNannostomusspecies inhabit the blackwater and clearwater streams, lakes, and flooded forests of the Amazon and Orinoco basins — soft, acidic, tannin-stained water with dense vegetation and leaf litter. A mature blackwater setup with Indian almond leaves, dark substrate, and very soft slightly acidic water produces the most vivid coloration. Males are territorial with each other — keep more females than males and provide visual breaks with dense planting.

The oblique resting posture — head elevated, body angled downward at roughly 45 degrees — is a characteristic behavior of theNannostomusgenus. Schools adopt synchronized oblique positions at rest, which is both fascinating to observe and unmistakable once seen. The angle varies by species — some hold a gentle tilt while others are nearly vertical. More adaptable to standard aquarium water conditions than most pencilfish. Keep in groups of 8+.

The recommended starting point for aquarists new to pencilfish.

Care & Ideal Parameters