Celestial pearl danio care
Danio margaritatus · Spring-fed ponds of Shan State, Myanmar
Celestial pearl danios (galaxy rasboras) are inch-long, pearl-spotted fish with orange fins.
- Tank size
- 10 US gal or larger
- Temperature
- 72 to 78 °F (22 to 26 °C)
- Group size
- 6 or more
- Temperament
- Peaceful
- Adult size
- 1 in
- pH
- 6.5 to 7.5
- Hardness (GH)
- 2 to 15 dGH
- Lifespan
- 3 to 5 years
- Diet
- Micropredator
- Care level
- Moderate
In a 10 gallon
20¼ × 10½ × 12 9/16 in outsideHow to keep celestial pearl danios
Celestial pearl danios (galaxy rasboras) are inch-long, pearl-spotted fish with orange fins. They are shy: a 10 gallon planted tank, 72 to 78 °F and a group of six or more brings them out. Males spar briefly without harm.
Diet: Micropredator: small frozen foods, crushed flakes, micro pellets. Fish food types compared · how often to feed.
Where they swim: Middle of the tank.
Celestial pearl danio tank mates
Share the temperature and water, and neither side eats, nips or bullies the other. Check the full group in the stocking checker.
Salt-and-pepper corydoras
1 in · 10+ gal · 72–79 °F
Zebra nerite snail
1 in · 5+ gal · 70–80 °F
Assassin snail
1 in · 5+ gal · 72–80 °F
Ramshorn snail
1 in · 5+ gal · 64–82 °F
Thai micro crab
1 in · 5+ gal · 70–82 °F
Spotted blue-eye
1 in · 10+ gal · 75–82 °F
Crystal red shrimp
1.2 in · 10+ gal · 62–76 °F
Malaysian trumpet snail
1.2 in · 5+ gal · 64–86 °F
Keep apart
Pea puffer: Pea puffers belong in a tank of their own.
Fancy goldfish: Adult fancy goldfish eat fish under about 2 in; celestial pearl danios grow to 1 in.
Paradise fish: Adult paradise fish eat fish under about 1.2 in; celestial pearl danios grow to 1 in.
Zebra pleco: No shared temperature: celestial pearl danios need 72 to 78 °F, zebra plecos 79 to 86 °F.
Golden wonder killifish: Adult golden wonder killifish eat fish under about 2 in; celestial pearl danios grow to 1 in.
Red-tail dwarf puffer: Red-tail dwarf puffers belong in a tank of their own.
What a celestial pearl danio tank needs
A tank of 10 US gallons or more (such as the 10 gallon) with a cover, and the equipment below.
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Aquarium Co-Op Easy Flow Sponge Filter, Small
A sponge filter gives gentle flow and cannot pull in small fish. It runs from an air pump, with airline tubing and a check valve, all sold separately.
hygger AquaFall Aquarium Filter, S
Rated by the maker for 7–10 US gal, which covers a 10 gallon celestial pearl danio tank without being built for a far bigger one.
Aqueon QuietFlow Internal Power Filter 5–15 gal
Rated by the maker for 5–15 US gal, which covers a 10 gallon celestial pearl danio tank without being built for a far bigger one.
hygger Precise Aquarium Heater 50W
Celestial pearl danios need 72 to 78 °F; most homes run cooler, so a heater holds the temperature.
API Freshwater Master Test Kit
Tests ammonia, nitrite, nitrate and pH, the readings that matter most before and after adding celestial pearl danios.
Seachem Prime 100 mL
Removes chlorine and chloramine from tap water at every water change.
Fluval Edge Thermometer
Shows the water temperature at a glance, so you know it stays within 72 to 78 °F.
More choices, each with the reason it is in or out: Filters for a 10 gallon tank · Heaters for a 10 gallon tank. We don’t list fish food: any good brand of the foods under Diet will do. Plan the whole tank's equipment →
Common celestial pearl danio problems
- Hiding all the time usually means too few of them or too little cover.
- They ignore flakes at first; start with small frozen foods.
Test the water first whenever fish look unwell: see what your readings mean, then match the symptom. For disease, a vet who treats fish can diagnose it and advise treatment.
More to compare
Sources
Name, origin and adult size checked against Wikipedia: Danio margaritatus. Temperature, pH, hardness, group size, lifespan and minimum tank size are common hobby guidance, not figures from that article. Ranges are the range the species tolerates; aim for the middle. Minimum tank sizes are for an adult group. Drawings are our own; photo credits follow.
Photo credits
Real photographs from Wikimedia Commons, resized and cropped to fit; each is used under the license named.
- Celestial pearl danio Cisamarc, CC BY-SA 3.0, via Wikimedia Commons
- Salt-and-pepper corydoras D.W., CC0, via Wikimedia Commons
- Zebra nerite snail TheJammingYam, CC BY-SA 3.0, via Wikimedia Commons
- Assassin snail Steffi Klee, CC BY-SA 3.0, via Wikimedia Commons
- Ramshorn snail Dat doris, CC BY-SA 4.0, via Wikimedia Commons
- Thai micro crab Sean Murray, CC BY-SA 2.0, via Wikimedia Commons
- Spotted blue-eye Der Regenbogenfisch, CC BY-SA 3.0 de, via Wikimedia Commons
- Crystal red shrimp DirkBlankenhaus, CC BY-SA 3.0, via Wikimedia Commons
- Malaysian trumpet snail Buchling, CC BY-SA 3.0, via Wikimedia Commons
- Pea puffer Beta Mahatvaraj, CC BY-SA 4.0, via Wikimedia Commons
- Fancy goldfish Benson Kua, CC BY-SA 2.0, via Wikimedia Commons
- Paradise fish André Karwath; edited by Muhammad, CC BY-SA 2.5, via Wikimedia Commons
- Zebra pleco Peaceinpianos, CC BY-SA 4.0, via Wikimedia Commons
- Golden wonder killifish Marrabbio2, CC BY-SA 3.0, via Wikimedia Commons
- Red-tail dwarf puffer Neale Monks (English Wikipedia), CC BY-SA 3.0, via Wikimedia Commons
- Harlequin rasbora NasserHalaweh, CC BY-SA 4.0, via Wikimedia Commons
- Chili rasbora JoKrimmel, CC BY-SA 4.0, via Wikimedia Commons
- Zebra danio Roundish, CC0, via Wikimedia Commons
- White cloud mountain minnow Petrtyl, CC BY 4.0, via Wikimedia Commons
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