Can Guppy Live With Otocinclus Catfish?
Guppy and Otocinclus Catfish are compatible. Temperature overlap 72–79°F. Both peaceful.
Conditions: Minimum 20 gallon tank.
Parameter Comparison
| Parameter | Guppy | Otocinclus Catfish | Overlap |
|---|---|---|---|
| Temperature | 72–82°F | 72–79°F | 72–79°F ✓ |
| pH Range | 6.8–7.8 | 6–7.5 | 6.8–7.5 ✓ |
| Temperament | peaceful | peaceful | Both peaceful ✓ |
| Max Size | 2.5" | 2" | Similar ✓ |
| Min Tank Size | 10 gal | 10 gal | 20 gal minimum together |
| Diet | Omnivore | Herbivore | — |
| Care Level | beginner | intermediate | — |
Tank Requirements for Guppy + Otocinclus Catfish
To keep Guppy and Otocinclus Catfish together, you need at minimum a 20 gallon tank. Guppy should be kept in a school of 3+. Otocinclus Catfish should be kept in a school of 6+. Provide adequate filtration, stable temperature with a heater, and hiding spots to reduce stress.
Species Profiles
Guppy
Poecilia reticulata
Guppies are colorful, hardy livebearers that are perfect for beginners. Males sport spectacular tail patterns in every color imaginable, while females are larger and less colorful. They breed prolifically — a single female can produce 20–50 fry every month — so plan accordingly or keep only males.
Full care guide →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 →