Black Molly tank mates
Poecilia sphenops
5 rated pairings from the Black Molly care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Black Molly needs at least 20 gallons on its own; every companion adds to that.
Excellent matches
3 · Same water, complementary zones, no conflict.
Guppy
Poecilia reticulata
10 gal min · 2" adult · Peaceful
Similar peaceful temperament, identical water parameters, and compatible size make them ideal companions
Platy
Xiphophorus maculatus
10 gal min · 2.5" adult · Peaceful
Fellow livebearer with matching care requirements and peaceful nature; can interbreed but offspring are sterile
Gold Mystery Snail
Pomacea bridgesii
5 gal min · 2" adult · Peaceful
Peaceful invertebrate that benefits from the same water conditions and helps control algae
Good matches
2 · Compatible with normal care — watch space and numbers.
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Small, peaceful schooling fish that coexist well; slightly prefer cooler temps but overlap is acceptable
Dwarf Gourami
Trichogaster lalius
15 gal min · 3.5" adult · Semi-aggressive
Peaceful mid-water dweller with compatible temperature range; generally non-aggressive toward mollies
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.