Gardneri Killifish tank mates
Fundulopanchax gardneri
6 rated pairings from the Gardneri Killifish care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Gardneri Killifish needs at least 10 gallons on its own; every companion adds to that.
Excellent matches
4 · Same water, complementary zones, no conflict.
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Bottom-dwelling algae eater with no dietary overlap; helps maintain tank cleanliness
Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Peaceful invertebrate that occupies different ecological niche; helps control algae
Java Moss
Taxiphyllum barbieri
Provides shelter and spawning substrate; creates natural habitat structure
Anubias Nana
Anubias barteri var. nana
Hardy plant that provides cover without being uprooted; safe for killifish tanks
Good matches
2 · Compatible with normal care — watch space and numbers.Least Killifish
Heterandria formosa
5 gal min · 1.5" adult · Peaceful
Similar size and peaceful temperament; both prefer live foods and top-dwelling zones
Emerald Dwarf Rasbora
Danio erythromicron
10 gal min · 1" adult · Peaceful
Small, peaceful schooling fish that occupy mid-water; minimal competition for food
Also recommended alongside Gardneri Killifish
Species whose own guides list Gardneri Killifish as a tank mate.
Argentine Pearlfish
Austrolebias bellottii
10 gal min · 1.5" adult · Semi-aggressive
Eggers' Notho
Nothobranchius eggersi
10 gal min · 1.5" adult · Semi-aggressive
Korthaus's Notho
Nothobranchius korthausae
10 gal min · 1.6" adult · Semi-aggressive
Nothobranchius Killifish
Nothobranchius rachovii
10 gal min · 2" adult · Semi-aggressive
Syngonanthus Belem
Syngonanthus sp. 'Belem'
Turquoise Killifish
Nothobranchius furzeri
5 gal min · 1.5" adult · Semi-aggressive
Walker's Killifish
Fundulopanchax walkeri
10 gal min · 1.5" adult · Peaceful
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.