Diamond Tetra tank mates
Moenkhausia pittieri
5 rated pairings from the Diamond Tetra care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Diamond Tetra needs at least 15 gallons on its own; every companion adds to that.
Excellent matches
2 · Same water, complementary zones, no conflict.
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Peaceful bottom-dweller with identical water parameter requirements; will not compete for mid-water space
Ember Tetra
Hyphessobrycon amandae
10 gal min · 0.8" adult · Peaceful
Similar-sized peaceful tetra with matching temperature and pH preferences; compatible schooling behavior
Good matches
2 · Compatible with normal care — watch space and numbers.
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Classic community tetra with overlapping water requirements; may school together despite size difference
Red Cherry Shrimp
Neocaridina davidi
5 gal min · 1.2" adult · Peaceful
Peaceful invertebrate that occupies different ecological niche; Diamond Tetras rarely predate on adult shrimp
Use caution
1 · Works in the right setup; read the note before combining.Also recommended alongside Diamond Tetra
Species whose own guides list Diamond Tetra as a tank mate.
Dense Waterweed
Egeria densa
Clown Pleco
Panaque maccus
20 gal min · 3.5" adult · Peaceful
Zebra Pleco
Hypancistrus zebra
30 gal min · 3.5" adult · Peaceful
Albino Angelfish
Pterophyllum scalare
30 gal min · 6" adult · Semi-aggressive
Albino Rainbow Shark
Epalzeorhynchos frenatum
55 gal min · 6" adult · Semi-aggressive
Ammannia Gracilis
Ammannia gracilis
Brown Ghost Knifefish
Apteronotus leptorhynchus
40 gal min · 8" adult · Semi-aggressive
Gold Nugget Pleco
Baryancistrus xanthellus
55 gal min · 10" adult · Semi-aggressive
Longfin Bristlenose Pleco
Ancistrus sp.
20 gal min · 5" adult · Peaceful
Pictus Catfish
Pimelodus pictus
55 gal min · 4.5" adult · Peaceful
Rainbow Shark
Epalzeorhynchos frenatum
55 gal min · 6" adult · Semi-aggressive
Silver Angelfish
Pterophyllum scalare
30 gal min · 6" adult · Semi-aggressive
Silver Dollar
Metynnis argenteus
55 gal min · 6" adult · Peaceful
South American Puffer
Colomesus asellus
30 gal min · 3.5" adult · Semi-aggressive
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.