Can Koi Angelfish live with Siamese Algae Eater?
Caution — with care
Why
- Only a narrow temperature overlap — keep both around 78–79°F.
Sweet spot: both do well at 78–79°F and pH 6.5–7 — aim there.
Side-by-side
| Koi Angelfish | Siamese Algae Eater | |
|---|---|---|
| Temperature | 78–84°F | 75–79°F |
| pH | 6–7.5 | 6.5–7 |
| Hardness (GH) | 3–12 dGH | 5–12 dGH |
| Adult size | 6" | 6" |
| Temperament | Peaceful | Peaceful |
| Min tank | 30 gal | 30 gal |
Together, plan on at least 30 gallons.
How to make it work
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: An adjustable heater → Chewy
Where to buy
- Koi Angelfish: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Siamese Algae Eater: 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 Koi Angelfish · …with Siamese Algae Eater