Can Otocinclus Catfish Live With Discus?
Otocinclus Catfish and Discus are compatible. Both peaceful.
Conditions: Minimum 55 gallon tank.
Parameter Comparison
| Parameter | Otocinclus Catfish | Discus | Overlap |
|---|---|---|---|
| Temperature | 72–79°F | 82–88°F | No overlap ✗ |
| pH Range | 6–7.5 | 5.5–7 | 6–7 ✓ |
| Temperament | peaceful | peaceful | Both peaceful ✓ |
| Max Size | 2" | 8" | Size mismatch ✗ |
| Min Tank Size | 10 gal | 55 gal | 55 gal minimum together |
| Diet | Herbivore | Carnivore/Omnivore | — |
| Care Level | intermediate | advanced | — |
Tank Requirements for Otocinclus Catfish + Discus
To keep Otocinclus Catfish and Discus together, you need at minimum a 55 gallon tank. Otocinclus Catfish should be kept in a school of 6+. Discus should be kept in a school of 5+. Provide adequate filtration, stable temperature with a heater, and hiding spots to reduce stress.
Species Profiles
Otocinclus Catfish
Otocinclus spp.
Otocinclus catfish (otos) are tiny, peaceful algae eaters that are incredibly effective at controlling soft green algae and diatoms in planted tanks. They are the gold standard for planted tank algae control, often preferred over larger plecos. However, they are somewhat delicate and require established, well-maintained aquariums.
Full care guide →Discus
Symphysodon spp.
Discus are widely considered the king of freshwater aquarium fish. Their disk-shaped body, vivid colors, and graceful swimming make them the ultimate showpiece. However, they are among the most demanding freshwater fish to keep, requiring warm, soft, exceptionally clean water, frequent feedings, and a stress-free environment. Discus are not recommended for beginners.
Full care guide →