How long do cichlids live
Smaller rift-lake cichlids live 5–8 years; oscars and other large Americans reach 10–15. Lifespan tracks water quality and diet. The classic killers are poor filtration (ammonia burns gills), aggression injuries left untreated, and "ich" (white-spot) outbreaks in stressed fish. Stable parameters beat fancy equipment.
Tank size and the aggression rule
Over-filter and over-space: a 55-gal (210 L) tank is a starting point for a small African community; oscars need 75 gal (285 L) each as adults. Use rockwork with sight breaks so fish can claim territories and avoid each other. Never mix a mild species with a known murderer. Quarantine every new fish 4 weeks.
Water chemistry by origin
This is the non-negotiable: African rift-lake cichlids need hard, alkaline water (pH 7.8–8.6); most South American cichlids want soft, slightly acidic (pH 6.0–7.0). Matching origin chemistry prevents chronic stress and disease. Test weekly with a liquid kit — strip tests lie. Frequent small water changes (30–50% weekly) keep nitrates low.
Diet and breeding chaos
Feed species-appropriate pellets plus frozen foods; Africans are largely herbivorous (algae-based), Americans are omnivorous/carnivorous. Overfeeding is the top water-quality killer — feed what is gone in 30 seconds, once or twice daily. Cichlids are mouth-brooders and cave-spawners; breeding pairs get violently territorial, so plan tank dividers or separate tanks.
Beginner mistakes to avoid
- Mixing incompatible cichlids — the tank becomes a war zone.
- Ignoring origin water chemistry — chronic stress and death.
- Overfeeding — nitrates spike and fish die slowly.
- No quarantine — ich and parasites sweep the tank.