Can Altum Angelfish live with Oscar?
Not recommended
Why
- Oscar is aggressive and will attack the peaceful Altum Angelfish.
- Oscar may eat Altum Angelfish; add only full-grown adults, because juveniles and fry will be picked off.
- No overlapping temperature: Altum Angelfish wants 82–88°F but Oscar wants 74–81°F.
- Only a narrow water hardness overlap — keep both around 5 dGH.
Side-by-side
| Altum Angelfish | Oscar | |
|---|---|---|
| Temperature | 82–88°F | 74–81°F |
| pH | 4.5–6.5 | 6–8 |
| Hardness (GH) | 1–5 dGH | 5–20 dGH |
| Adult size | 7" | 16" |
| Temperament | Peaceful | Aggressive |
| Min tank | 75 gal | 75 gal |
Together, plan on at least 75 gallons.
Compatible alternatives
Instead of Altum Angelfish (to keep Oscar):
- Oscar — 16", aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Giant Gourami — 24", semi-aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Typhoon Pleco — 12", semi-aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
Instead of Oscar (to keep Altum Angelfish):
- Giant Gourami — 24", semi-aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Moonlight Gourami — 6", peaceful buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Siamese Algae Eater — 6", peaceful buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
Where to buy
- Altum Angelfish: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Oscar: 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 Oscar