CheckMyFishTankTurquoise Rainbowfish care
Melanotaenia lacustris · Freshwater · Beginner level care
A bright, active schooling fish.
Feeding
Twice a day. A small pinch they finish in about 2 minutes, a little more for bigger fish. Flakes, small pellets, frozen foods.
Good tank mates
Fish that pass every check with Turquoise Rainbowfish in a 80 gallon tank: same water, overlapping temperature, nobody gets eaten and no bullies.
Do not mix with
- Tinfoil Barb: Tinfoil Barb grows big enough to eat Turquoise Rainbowfish.
- Discus: Discus and Turquoise Rainbowfish need different water temperatures.
- Convict Cichlid: Convict Cichlid is aggressive and will bully peaceful Turquoise Rainbowfish.
- Oscar: Oscar grows big enough to eat Turquoise Rainbowfish.
- Jack Dempsey: Jack Dempsey is aggressive and will bully peaceful Turquoise Rainbowfish.
- Green Terror: Green Terror grows big enough to eat Turquoise Rainbowfish.
- Red Zebra Cichlid: Red Zebra Cichlid is aggressive and will bully peaceful Turquoise Rainbowfish.
- Cobalt Blue Zebra: Cobalt Blue Zebra is aggressive and will bully peaceful Turquoise Rainbowfish.
Questions
What size tank does a Turquoise Rainbowfish need?
At least 40 gallons for a group of 6. Adults grow to about 4 inches, so plan for the adult size, not the size at the store.
What temperature does a Turquoise Rainbowfish like?
72 to 80 degrees Fahrenheit, with a pH of about 7 to 8. A steady temperature matters more than hitting one exact number.
How many Turquoise Rainbowfish should I keep together?
Keep 6 or more. They feel safe in a group and show better color and behavior.
What do Turquoise Rainbowfish eat?
Flakes, small pellets, frozen foods. Feed twice a day: a small pinch they finish in about 2 minutes, a little more for bigger fish.
Sources
Checked against these sources on 2026-11-10. When sources disagree we use the safer number.