Can Altum Angelfish live with Cardinal Tetra?
Caution — with care
Why
- No overlapping temperature: Altum Angelfish wants 82–88°F but Cardinal Tetra wants 73–81°F.
- Altum Angelfish is large enough to threaten a small Cardinal Tetra — usually fine once both are adult, but watch new additions.
Side-by-side
| Altum Angelfish | Cardinal Tetra | |
|---|---|---|
| Temperature | 82–88°F | 73–81°F |
| pH | 4.5–6.5 | 5–7 |
| Hardness (GH) | 1–5 dGH | 1–6 dGH |
| Adult size | 7" | 2" |
| Temperament | Peaceful | Peaceful |
| Min tank | 75 gal | 15 gal |
Together, plan on at least 75 gallons.
How to make it work
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: An adjustable heater → Chewy GH remineraliser → Aquarium Co-Op
Where to buy
- Altum Angelfish: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Cardinal Tetra: 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 Altum Angelfish · …with Cardinal Tetra