Halfmoon Guppy tank mates
Poecilia reticulata
4 rated pairings from the Halfmoon Guppy care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Halfmoon Guppy needs at least 10 gallons on its own; every companion adds to that.
Excellent matches
2 · Same water, complementary zones, no conflict.Endler Guppy
Poecilia wingei × Poecilia reticulata
5 gal min · 1.5" adult · Peaceful
Same family, compatible water parameters, and peaceful temperament; may hybridize if both sexes present
Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Algae eater that helps maintain tank cleanliness without competing for food or space
Good matches
2 · Compatible with normal care — watch space and numbers.
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Similar size and water requirements; peaceful community fish that won't nip delicate guppy fins
Dwarf Gourami
Trichogaster lalius
15 gal min · 3.5" adult · Semi-aggressive
Peaceful mid-water swimmer with compatible temperature range; monitor for any territorial behavior
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.