Black Calvus tank mates
Altolamprologus calvus
5 rated pairings from the Black Calvus care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Black Calvus needs at least 30 gallons on its own; every companion adds to that.
Excellent matches
1 · Same water, complementary zones, no conflict.
Good matches
3 · Compatible with normal care — watch space and numbers.
Bristlenose Pleco
Ancistrus sp.
20 gal min · 5" adult · Peaceful
Nocturnal bottom-dweller that occupies different habitat zones; unlikely to compete directly for food or territory
Nerite Snail
Neritina natalensis
5 gal min · 1" adult · Peaceful
Algae grazer that occupies different ecological niche; hard shell provides protection from predation attempts
Horned Nerite Snail
Clithon corona
5 gal min · 0.75" adult · Peaceful
Similar to Nerite snail; provides cleanup function without competing for resources or space
Use caution
1 · Works in the right setup; read the note before combining.Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.