Royal Gramma and Zebra Danio Compatibility Overview
Royal Gramma and Zebra Danio are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. Their pH ranges do not meet: Royal Gramma wants 8.1โ8.4 and Zebra Danio wants 6.5โ8.0. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Royal Gramma | Zebra Danio | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 64โ82ยฐF | โ 72โ82ยฐF |
| pH Range | 8.1โ8.4 | 6.5โ8.0 | โ No overlap |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 3.0 in | 2 in | โ Similar |
| Min. Group | 1+ | 5+ | See below |
| Min. Tank Size | 20 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Royal Gramma โ Gramma loreto
The Royal Gramma, known for its vibrant blue coloration, is a popular saltwater fish among beginners and experienced aquarists alike. It requires a well-maintained tank with plenty of swimming space and a moderate current. With a peaceful temperament and a relatively easy care routine, the Royal Gramma can be a great addition to a community tank.
โ Full Royal Gramma care guide
Zebra Danio โ Danio rerio
Extremely hardy, fast-moving schooling fish tolerant of a wide temperature range. Active top-to-mid swimmers compatible with most community fish.
Frequently Asked Questions
Can Royal Gramma live with Zebra Danio?
Generally not recommended. Royal Gramma and Zebra Danio are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. Their pH ranges do not meet: Royal Gramma wants 8.1โ8.4 and Zebra Danio wants 6.5โ8.0. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Royal Gramma and Zebra Danio together?
A minimum of 20 gallons is recommended for keeping Royal Gramma and Zebra Danio together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Royal Gramma and Zebra Danio?
72โ82ยฐF โ inside Royal Gramma's 72โ82ยฐF and Zebra Danio's 64โ82ยฐF.
Is a Royal Gramma aggressive toward a Zebra Danio?
Royal Gramma is semi and Zebra Danio is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Royal Gramma and Zebra Danio
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 30 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 55 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 75 gal | Best when keeping larger schools or reducing territorial pressure. |