Blue Tang and Red Eye Tetra Compatibility Overview
Blue Tang and Red Eye Tetra 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: Blue Tang wants 8.1โ8.4 and Red Eye Tetra wants 6.0โ8.0. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Blue Tang | Red Eye Tetra | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 72โ79ยฐF | โ 72โ79ยฐF |
| pH Range | 8.1โ8.4 | 6.0โ8.0 | โ No overlap |
| Temperament | semi | semi | โ ๏ธ Monitor |
| Adult Size | 12.0 in | 2.8 in | โ 4ร difference |
| Min. Group | 1+ | 6+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Blue Tang โ Paracanthurus hepatus
The Blue Tang is a popular saltwater fish known for its vibrant blue color and yellow stripes. These fish are generally peaceful and can be kept in a community tank with other non-aggressive species. They require a well-maintained, spacious tank with plenty of swimming space and hiding spots.
Red Eye Tetra โ Moenkhausia sanctaefilomenae
The Red Eye Tetra is a popular freshwater fish known for its vibrant red eyes and sleek, silver body. They are generally peaceful and can be kept in a community tank with other non-aggressive species. Their moderate activity level makes them suitable for a variety of aquarium setups. With proper care, they can live up to 5 years.
Frequently Asked Questions
Can Blue Tang live with Red Eye Tetra?
Generally not recommended. Blue Tang and Red Eye Tetra 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: Blue Tang wants 8.1โ8.4 and Red Eye Tetra wants 6.0โ8.0. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Blue Tang and Red Eye Tetra together?
A minimum of 100 gallons is recommended for keeping Blue Tang and Red Eye Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Blue Tang and Red Eye Tetra?
72โ79ยฐF โ inside Blue Tang's 72โ82ยฐF and Red Eye Tetra's 72โ79ยฐF.
Is a Blue Tang aggressive toward a Red Eye Tetra?
Blue Tang is semi and Red Eye Tetra is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Blue Tang and Red Eye Tetra
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 180 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 300 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 350 gal | Best when keeping larger schools or reducing territorial pressure. |