Apistogramma and Celestial Pearl Danio: Can They Live Together?
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Side-by-side comparison
| Factor | Apistogramma | Celestial Pearl Danio | Assessment |
|---|---|---|---|
| Water temperature | 75–83°F | 72–79°F | Overlap 75–79°F |
| pH | 5.5–7 | 6.5–7.5 | Overlap 6.5–7 |
| Hardness | 2–12 dGH | 5–15 dGH | Overlap 5–12 dGH |
| Adult size | 3.0″ | 1.0″ | 3.0× difference |
| Temperament | Semi | Peaceful | Watch territory |
| Swim level | Bottom | Mid | Different zones |
| Minimum tank | 20 gal | 10 gal | Together: 26 gal+ |
Shared water parameters
- Temperature both tolerate: 75–79°F
- pH both tolerate: 6.5–7
- Hardness both tolerate: 5–12 dGH
- Recommended combined tank: 26 gallons or larger
Risks and things to watch
Size mismatch — predation risk
Apistogramma reaches 3.0″ while Celestial Pearl Danio tops out at 1.0″. As a rough rule, anything that fits in another fish's mouth eventually will. This is the main reason this pairing needs care.
Spawning aggression
Semi-aggressive species are usually calm until they pair off. Expect a territory to be claimed and defended around caves or flat surfaces.
Group requirements
Compatibility is not only about the two species getting along — each still needs its own social setup met inside the same tank.
- Apistogramma — no group requirement; single specimens are fine.
- Celestial Pearl Danio — minimum group of 8. Budget tank space for the whole shoal, not one fish.
Frequently asked questions
Can apistogramma and celestial pearl danio live together?
Not recommended. We do not recommend housing Apistogramma with Celestial Pearl Danio. The conflicts below are structural — they are not solved by a bigger tank or more plants. Choose a different tank mate instead.
What size tank do apistogramma and celestial pearl danio need together?
Plan for at least 26 gallons. Apistogramma alone needs 20 gallons and Celestial Pearl Danio needs 10, but combined stocking needs headroom for filtration and swimming space, not just volume.
What temperature suits both species?
Both are comfortable between 75 and 79°F. Set the heater to the middle of that window and keep it stable.
What pH works for both?
Aim for pH 6.5–7, which sits inside both species' comfortable range.
Will apistogramma eat celestial pearl danio?
It is a real risk. The size difference is 3.0×, and anything that fits in a fish's mouth is eventually treated as food.
How should the tank be arranged?
Use plants, wood and rock to break sight lines, keep open swimming space along the front, and add the more territorial species last so it cannot claim the whole tank before the other settles in.
Explore further
Assessment generated from our compatibility methodology: parameter overlap, adult size ratio, temperament and swimming zone. Reviewed by Marcus Rivera.