Banded Rainbowfish (Melanotaenia trifasciata) is a beginner-level freshwater fish that needs at least 55 gallons and 72-82°F. A hardy, active Australian rainbowfish with bold horizontal bands and colorful males. It likes a long tank, harder water and a group, and the males color up best when kept with several females.
Care facts at a glance
| Scientific name | Melanotaenia trifasciata |
|---|---|
| Family | Melanotaeniidae |
| Origin | Northern Australia |
| Adult size | 4-5 in |
| Minimum tank | 55 gallons |
| Temperature | 72-82°F |
| pH | 6.5-8.0 |
| Temperament | Peaceful, active |
| Social behavior | Schooling, keep 6+ |
| Swim level | Mid to upper |
| Difficulty | Beginner |
| Diet | Omnivore: flakes, micro pellets, frozen and live foods |
| Typical lifespan | 5-8 years |
Quick tips
- Keep six or more.
- Use a long tank and a tight lid.
- Prefers neutral to alkaline, moderately hard water.
San Diego water
Tolerates San Diego's hard, alkaline tap water (pH roughly 7.6-8.6) with slow acclimation and a conditioner that handles chloramine. Learn the numbers in our San Diego tap water guide.
Before you buy
Make sure your tank is cycled (how to cycle a tank), check your numbers with the water testing guide, and use the compatibility guide to check tankmates. These are general ranges; individual fish and local water vary.
Find it at Pet Zone
Pet Zone Tropical Fish is a San Diego aquarium store with two locations. Stock changes daily, so call ahead if you are after a specific species or plant. Shop online at petzonesd.com.
4160 Convoy St, San Diego, CA 92111
(858) 987-0309
Open daily, 10am-6pm
Aquascaping, planted tanks
4266 University Ave, San Diego, CA 92105
(619) 283-1812
Closed Monday; Tue-Fri 10:30am-6pm, Sat 11am-6pm, Sun 11am-4pm
Monster fish, koi