Can Betta (Siamese Fighting Fish) live with Common Pleco?
Caution — with care
Why
- Betta (Siamese Fighting Fish) is semi-aggressive and may bully the peaceful Common Pleco — give lots of space and cover.
- Large size gap (Betta (Siamese Fighting Fish) 2.5" vs Common Pleco 24") — the bigger fish may eat the smaller one as they grow.
Sweet spot: both do well at 76–82°F and pH 6–7.5 — aim there.
Side-by-side
| Betta (Siamese Fighting Fish) | Common Pleco | |
|---|---|---|
| Temperature | 76–82°F | 72–82°F |
| pH | 6–7.5 | 6–8 |
| Hardness (GH) | 2–12 dGH | 5–20 dGH |
| Adult size | 2.5" | 24" |
| Temperament | Semi-aggressive | Peaceful |
| Min tank | 5 gal | 150 gal |
Together, plan on at least 150 gallons.
How to make it work
- Keep a large, established shrimp colony in a heavily planted tank with moss and cover so enough survive to breed.
- Use a larger, well-decorated tank with sightline breaks, keep everyone well-fed, and add the calmer fish first.
- Add only full-grown adults — never juveniles, which will be eaten.
Sort it with: GH remineraliser → Aquarium Co-Op
Where to buy
- Betta (Siamese Fighting Fish): buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Common Pleco: 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 Betta (Siamese Fighting Fish) · …with Common Pleco