Glass Knifefish tank mates
Eigenmannia virescens
5 rated pairings from the Glass Knifefish care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Glass Knifefish needs at least 40 gallons on its own; every companion adds to that.
Excellent matches
1 · Same water, complementary zones, no conflict.
Good matches
4 · Compatible with normal care — watch space and numbers.
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Small, peaceful schooling fish that occupy different water zones
Cardinal Tetra
Paracheirodon axelrodi
15 gal min · 2" adult · Peaceful
Similar size and temperament, peaceful community fish
Dwarf Gourami
Trichogaster lalius
15 gal min · 3.5" adult · Semi-aggressive
Peaceful surface-dwelling fish with minimal interaction
Rummy Nose Tetra
Hemigrammus rhodostomus
15 gal min · 2" adult · Peaceful
Peaceful schooling fish that coexist well in community settings
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.