Molly tank mates
Poecilia sphenops
5 rated pairings from the Molly care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Molly needs at least 15 gallons on its own; every companion adds to that.
Excellent matches
3 · Same water, complementary zones, no conflict.
Platy
Xiphophorus maculatus
10 gal min · 2.5" adult · Peaceful
Nearly identical water requirements and peaceful temperament; both are livebearers with similar care needs
Guppy
Poecilia reticulata
10 gal min · 2" adult · Peaceful
Compatible water parameters and peaceful nature; both thrive in community settings
Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Peaceful algae eater that shares same water parameters; helps maintain tank cleanliness
Good matches
2 · Compatible with normal care — watch space and numbers.
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Peaceful schooling fish; prefers slightly cooler temps but adapts well to molly tanks
Dwarf Gourami
Trichogaster lalius
15 gal min · 3.5" adult · Semi-aggressive
Peaceful and compatible with warm water; may occasionally chase fry but generally safe with adults
Also recommended alongside Molly
Species whose own guides list Molly as a tank mate.
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.