AquaStocker

Boesemani Rainbowfish Care Guide

Melanotaenia boesemani · Moderate care · 30 gallon minimum

Updated June 2026
By the AquaStocker team · How we source our data
Boesemani Rainbowfish (Melanotaenia boesemani)
Photo via Wikimedia Commons 📌 Save

A showstopper with a blue-to-orange split body; needs a roomy tank and a group to color up fully.

Adult size4.0"
Min tank30 gal
Temp75–82°F
pH7–8
TemperamentPeaceful
SocialGroups of 6+
Care levelModerate
DietOmnivore

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How big does a boesemani rainbowfish get?

A boesemani rainbowfish (Melanotaenia boesemani) reaches about 4.0 inches as an adult. Plan tank size and tank mates around the adult size, not the small fish you buy at the store.

Tank size & setup

Give a boesemani rainbowfish a minimum of 30 gallons, with water at 75–82°F and a pH of 7–8. Keep them in groups of at least 6 — they are shoaling fish and become stressed and washed-out alone. As a moderate-care, omnivore species, a stable, cycled tank with the right diet keeps them healthiest.

Good tank mates

Pair a boesemani rainbowfish with peaceful species that share its temperature and pH range. Compatible options include:

About the boesemani rainbowfish

Boeseman's rainbowfish, also known as the Boesemani rainbowfish, is a species of fish in the family Melanotaeniidae.

Recommended gear for boesemani rainbowfishs

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FAQ

What size tank does a boesemani rainbowfish need?
At least 30 gallons. Because they shoal, budget for a group of 6+ rather than a single fish. Bigger is always more forgiving for water quality.
Is the boesemani rainbowfish good for beginners?
It's a moderate-care species, so dial in a stable, cycled tank and correct water parameters first.

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