Can guppies and mollies live together?

Yes

Guppies and mollies can share a tank. Their water needs overlap and neither is known to bother the other.

Guppy Molly

Why

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

What each one needs

GuppyMollyBoth
Temperature72–82°F (22–28°C)72–82°F (22–28°C)72–82°F (22–28°C)
pH6.8–7.87.5–8.57.5–7.8
Minimum tank5 gal (19 L)20 gal (76 L)20 gal (76 L)
Keep at least33
Adult size2 in (5.1 cm)4 in (10.2 cm)

The smallest tank for both

A 20 gallons (76 L) tank holds 3 guppies and 3 mollies at about 60% of its stocking limit, which leaves room for more.

Try this pair in the planner

Other tank mates for guppies

Other tank mates for mollies