Glowlight Danio Care Guide: Tiny Jewels for Nano Tanks

The glowlight danio (Celestichthys choprae) is a small, strikingly patterned danio from the rivers of northern Myanmar. Its golden body covered in turquoise-green bars and orange fin accents makes it a hidden gem of the nano fish world. This glowlight danio care guide from Gensou Aquascaping at 5 Everton Park will help you bring out the best in these delightful little fish.

Glowlight Danio Overview

Glowlight danios were first described in 1928 but only became widely available in the aquarium trade in the early 2000s. They grow to just 3 cm, making them perfect for nano tanks and densely planted aquascapes. Males display brighter colours and slimmer bodies than females. With proper care, they live for three to four years.

Tank Requirements

A school of eight to ten glowlight danios does well in a 30-litre nano tank, though 40–60 litres allows them to school more naturally. They prefer moderate water flow and well-oxygenated water. Maintain the temperature between 20 °C and 26 °C, with a pH of 6.0–7.5 and soft to moderately hard water (GH 2–12 dGH). In Singapore, an air-conditioned room keeps temperatures in their preferred range without a chiller.

Diet and Feeding

Glowlight danios accept most small foods. Crushed flake and micro pellets form the staple diet. Supplement with frozen cyclops, daphnia and baby brine shrimp for optimal colour and health. Live foods like vinegar eels and microworms are especially appreciated. Their small mouths mean food must be appropriately sized — large pellets will be ignored. Feed small portions two to three times daily.

Tank Mates

Due to their small size, choose tank mates carefully. Excellent companions include other nano fish like chili rasboras, ember tetras, celestial pearl danios, pygmy Corydoras and dwarf shrimp. Avoid any fish large enough to eat them or boisterous species that outcompete them for food. In a dedicated nano tank, a large school of glowlight danios creates a mesmerising display.

Aquascaping for Glowlight Danios

Their colours pop against dark substrate and lush green plantings. Create a layout with dense background plants, midground Cryptocoryne or Bucephalandra, and open swimming space in the front. Driftwood and scattered botanicals like catappa leaves add tannins that enhance their colour and replicate their natural forest-stream habitat. Moderate lighting works best.

Breeding Glowlight Danios

Glowlight danios are egg scatterers that spawn among fine-leaved plants. A conditioned group in a planted tank may spawn spontaneously, with a few fry surviving among dense vegetation. For targeted breeding, use a separate tank with spawning mops or Java Moss. Eggs hatch in two to three days, and fry need infusoria or paramecium for the first week before graduating to baby brine shrimp.

Common Health Issues

These danios are generally hardy but more sensitive than their zebra danio relatives. They are susceptible to stress from poor water quality and overcrowding. Ich and bacterial infections can occur after transport or sudden parameter changes. Quarantine new arrivals for two weeks and maintain stable conditions for long-term health.

Related Reading

• How to Breed Celestial Pearl Danios: Galaxy Rasbora Fry Guide
• Celestial Pearl Danio Care Guide: Galaxy Rasbora in Nano Tanks
• Celestial Pearl Danio vs Ember Tetra: Which Nano Fish to Choose
• Celestial Pearl Danio vs Neon Tetra: Which Is Right for You?
• Giant Danio Care Guide: Active Schoolers for Large Tanks