Millennium Rainbow
Millennium Rainbow (Glossolepis pseudoincisus) is a close relative of the Red Rainbow with a similar high-backed male profile and intense body coloration. Males display a vivid red-orange to salmon coloration with strong iridescent highlights. Named around the turn of the millennium when it became more widely available in the hobby, it is slightly less commonly seen than G. incisus.
Feeding & Care Tip: Sera Vipan Tropical Flakes and Hikari Micro Pellets make excellent daily staples. Supplement 2–3× per week with Hikari Frozen or Freeze-Dried Bloodworms. Crush flakes for juveniles; soak pellets. Males develop full color slowly — juveniles are pale.
Native to West Papua, Indonesia. As with related Glossolepis species, males take time to develop full coloration and females remain considerably plainer. Slightly hard, alkaline water with good filtration is preferred.
Keep in groups of at least six with mixed sexes. Active display behavior between males produces intense coloration. Peaceful with other medium to large community fish.
A well-planted aquarium with open swimming space in the center replicates the rainbowfish's natural riverine habitat. These are active, fast-swimming fish that appreciate length more than height — a longer tank allows them to build up speed and display properly. Good filtration and regular partial water changes are important, as rainbowfish are sensitive to deteriorating water quality. Avoid very small or slow-moving tankmates that may be outcompeted at feeding time.
Care & Ideal Parameters
| Difficulty | Easy |
| Temperament | Peaceful — Community |
| Typical Adult Size | 5.0 inches (12.5 cm) |
| Min. Group Size | 6 minimum — mixed sexes for best male coloration |
| Ideal Temp | 72–82°F (22–28°C) |
| Ideal pH | 7.0–8.0 |
| Ideal GH | 8–20 dGH |
| Ideal KH | 4–12 dKH |
| Staple Food | Sera Vipan Tropical Flakes; Hikari Micro Pellets |
| Treat / Supplement | Hikari Frozen or Freeze-Dried Bloodworms |
| Origin | West Papua, Indonesia |
| Notes | Close relative of Red Rainbow (Glossolepis incisus). Males develop vivid red-orange. Females remain plain. Slightly hard alkaline water preferred. Less commonly available than G. incisus. |
