Can Cardinal Tetra Live With Firefish Goby?
Incompatible pH. Cardinal Tetra needs 4.5–7.0, Firefish Goby needs 8.1–8.4.
Parameter Comparison
| Parameter | Cardinal Tetra | Firefish Goby | Overlap |
|---|---|---|---|
| Temperature | 73–81°F | 75–80°F | 75–80°F ✓ |
| pH Range | 4.5–7 | 8.1–8.4 | No overlap ✗ |
| Temperament | peaceful | peaceful | Both peaceful ✓ |
| Max Size | 2" | 3" | Similar ✓ |
| Min Tank Size | 10 gal | 20 gal | 20 gal minimum together |
| Diet | Omnivore | Carnivore | — |
| Care Level | intermediate | beginner | — |
Species Profiles
Cardinal Tetra
Paracheirodon axelrodi
Cardinal tetras look similar to neon tetras but have a red stripe that extends the entire length of their body (vs only the back half in neons). They prefer softer, more acidic water and are slightly more delicate, but their deeper coloration makes them highly sought after.
Full care guide →Firefish Goby
Nemateleotris magnifica
Firefish gobies are graceful, flame-colored marine fish that hover above the rock work like tiny, living flames. Their elongated dorsal spine and gradient from white to red-orange makes them visually striking. They are peaceful, hardy, and reef-safe, making them ideal for beginner marine aquariums. They require a tight-fitting lid as they are notorious jumpers.
Full care guide →