Can otocinclus and bristlenose plecos live together?

Yes

Otocinclus and bristlenose plecos can share a tank. Their water needs overlap and neither is known to bother the other.

Otocinclus Bristlenose pleco

Why

  • Their temperature and pH ranges overlap comfortably, and neither is known to nip, chase or eat the other.

What each one needs

OtocinclusBristlenose plecoBoth
Temperature72–79°F (22–26°C)73–81°F (23–27°C)73–79°F (23–26°C)
pH6.0–7.56.5–7.56.5–7.5
Minimum tank10 gal (38 L)29 gal (110 L)29 gal (110 L)
Keep at least41
Adult size1.8 in (4.6 cm)5 in (12.7 cm)

The smallest tank for both

A 29 gallons (110 L) tank holds 4 otocinclus and 1 bristlenose pleco at about 31% of its stocking limit, which leaves room for more.

Other tank mates for otocinclus

Other tank mates for bristlenose plecos