Can Black Sail Cory live with Flash Pleco (L204)?
Caution — with care
Why
- Very different sizes (Flash Pleco (L204) 20" vs Black Sail Cory 2") — these two need different tanks, and the smaller fish will be out-competed at feeding time.
- Only a narrow water hardness overlap — keep both around 6–7.5 dGH.
Sweet spot: both do well at 75–82°F and pH 6.5–7 — aim there.
Side-by-side
| Black Sail Cory | Flash Pleco (L204) | |
|---|---|---|
| Temperature | 75–82°F | 72–82°F |
| pH | 5.5–7 | 6.5–7.6 |
| Hardness (GH) | 2–10 dGH | 6–7.5 dGH |
| Adult size | 2" | 20" |
| Temperament | Peaceful | Peaceful |
| Min tank | 20 gal | 125 gal |
Together, plan on at least 125 gallons.
How to make it work
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: A larger tank · GH remineraliser
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