Harrison's pencilfish
Nannostomus harrisoni
Nannostomus harrisoni reaches up to 4 cm. Its body is elongated with an upward mouth. It has a thick horizontal black line on the flank, and a bright red spot on the anal fin. The caudal fin is hyaline with red reflections. It is a peaceful, schooling surface-dwelling fish. It is less common in the aquarium trade than other Nannostomus. It prefers soft, acidic water. Its behavior is similar to other pencilfish.
Recommended parameters
| Parameter | Recommended range |
|---|---|
| Temperature | 23–28 |
| pH | 5.5–7 |
| GH | 2–10 |
| KH | 1–5 |
| NO₃ | ≤ 20 |
| PO₄ | ≤ 0.5 |
Care
Care notes
Aquarium of at least 40 liters, well planted with shaded areas. Soft and acidic water (pH 5.5-7.0, GH 2-10) at 23-28°C. Diet: small insects, brine shrimp, daphnia, and fine dry food. Compatible with other small peaceful fish. Keep in groups of at least 6. Avoid aggressive tankmates. Regular water changes. Sensitive to water quality.