Can Cardinal Tetra live with German Blue Ram?
Compatible
Why
No conflicts — these two share similar water needs, temperament, and size, and neither is a threat to the other.
Sweet spot: both do well at 78–81°F and pH 5.5–7 — aim there.
Side-by-side
| Cardinal Tetra | German Blue Ram | |
|---|---|---|
| Temperature | 73–81°F | 78–85°F |
| pH | 5–7 | 5.5–7 |
| Hardness (GH) | 1–6 dGH | 1–8 dGH |
| Adult size | 2" | 2.5" |
| Temperament | Peaceful | Peaceful |
| Min tank | 15 gal | 20 gal |
Together, plan on at least 20 gallons.
Where to buy
- Cardinal Tetra: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- German Blue Ram: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
Live-animal shipping: add a heat pack below 50°F, expect weather holds above 90°F, and schedule delivery for a moderate week when someone can receive it promptly.
Build a full tank around this stocking →Everything compatible with Cardinal Tetra · …with German Blue Ram