Festivum tank mates
Mesonauta festivus
6 rated pairings from the Festivum care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Festivum needs at least 45 gallons on its own; every companion adds to that.
Excellent matches
3 · Same water, complementary zones, no conflict.
Cardinal Tetra
Paracheirodon axelrodi
15 gal min · 2" adult · Peaceful
Similar water parameter requirements and peaceful temperament
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Small, peaceful schooling fish that won't compete with Festivums
Harlequin Rasbora
Trigonostigma heteromorpha
10 gal min · 2" adult · Peaceful
Peaceful schooling fish compatible with Festivums' water parameters
Good matches
3 · Compatible with normal care — watch space and numbers.Corydoras Duplicareus
Corydoras duplicareus
15 gal min · 2.2" adult · Peaceful
Bottom dweller that occupies different water zone and shares similar water conditions
Apistogramma Borellii
Apistogramma borellii
20 gal min · 3" adult · Semi-aggressive
Dwarf cichlid with similar peaceful temperament and water requirements
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Algae eater that won't interfere with Festivums and prefers similar conditions
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.