How long do rasboras live
Rasboras live about 4–6 years. They are hardy but prefer stable, mature water — not a brand-new tank. Ammonia and nitrate spikes and sudden pH swings are the risks. A planted, cycled tank with a group of 10+ keeps them stress-free and long-lived.
Tank and the shoal effect
Keep 10 or more in a 10–20 gal (40–75 L) planted tank. Soft, slightly acidic to neutral water (pH 6.0–7.5), gentle flow, and dim lighting bring out their color. A lone rasbora hides and fades; a big shoal shimmers. They are top-to-mid swimmers — give open water above the plants.
Diet and temperament
Feed fine flakes, micro-pellets, and tiny frozen foods (baby brine, daphnia). Small mouths mean small food. Rasboras are peacefully competitive at feeding — ensure shy individuals get food. Twice-daily small meals beat one big one. They will not nip fins; mix freely with other calm species.
Planted-tank synergy
Rasboras and planted tanks are made for each other: plants soften water, lower nitrate, and provide cover that keeps them calm. Add leaf litter or driftwood for tannins many rasboras appreciate. Avoid aggressive or large tank mates that see them as snacks. A well-planted rasbora tank is low-maintenance and beautiful.
Beginner mistakes to avoid
- Keeping too few — they hide and lose color alone.
- Hard, alkaline water for soft-water species.
- Big or aggressive tank mates — rasboras get eaten.
- Overlighting — they prefer dim, planted calm.