Can Oscar live with Flash Pleco (L204)?
Not recommended
Why
- Oscar is aggressive and will attack the peaceful Flash Pleco (L204).
- Only a narrow water hardness overlap — keep both around 6–7.5 dGH.
Side-by-side
| Oscar | Flash Pleco (L204) | |
|---|---|---|
| Temperature | 74–81°F | 72–82°F |
| pH | 6–8 | 6.5–7.6 |
| Hardness (GH) | 5–20 dGH | 6–7.5 dGH |
| Adult size | 16" | 20" |
| Temperament | Aggressive | Peaceful |
| Min tank | 75 gal | 125 gal |
Together, plan on at least 125 gallons.
Compatible alternatives
Instead of Oscar (to keep Flash Pleco (L204)):
- 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
Instead of Flash Pleco (L204) (to keep Oscar):
- Typhoon Pleco — 12", semi-aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Giant Gourami — 24", semi-aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Oscar — 16", aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
Where to buy
- Oscar: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Flash Pleco (L204): 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 Oscar · …with Flash Pleco (L204)