Zebra Danio Care Sheet

Beginner

Danio rerio · fish

Active, hardy schooling fish ideal for beginners. They thrive in cooler water and are easy to care for.

Quick care stats

Adult size2-2.5 inches

Lifespan3-5 years

Min tank size10 gallons

Water temp64-75F

pH6.5-7.5

Hardness5-15 dGH

Temperamentpeaceful

Group / schoolinggroup of 6+

Tank matesOther peaceful community fish like tetras, rasboras, and corydoras.

DietOmnivorous; feed high-quality flakes or small pellets daily, supplement with brine shrimp or daphnia once or twice a week.

What you need (full setup)

🔧 Tank (10-20 gallons)Provides enough swimming space for a school of 6+ fish.🔧 Hang-on-back or sponge filterMaintains water quality with gentle flow; sponge filter safe for fry.🔧 Adjustable heater (optional)Stabilizes temperature if room fluctuates, though they tolerate cooler temps.🔧 ThermometerMonitors water temperature to stay within safe range.🔧 Sand or fine gravel substrateMimics natural habitat and is easy to clean.🔧 Water conditioner (dechlorinator)Removes chlorine and chloramine from tap water.🔧 API Freshwater Master Test KitRegularly monitors ammonia, nitrite, nitrate, and pH.🔧 Plants and decor (e.g., Java moss, driftwood)Provides hiding spots and reduces stress; floating plants diffuse light.

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Common health issues

Fin nipping if kept in small groups
Prone to ich under stress
May jump; need tight-fitting lid

⚠️ For any sign of illness (not eating, lethargy, swelling, retained shed), see a qualified exotics vet. Care sheets are general guidance only.