Alkaline Cichlid

Oreochromis alcalicus

Photo of aquarium fish Alkaline Cichlid
Natural range
  • Lake Natron area
  • Lake Shompole area
  • Kenya
  • Tanzania
Cichlids

Family:Cichlids (Cichlidae)

formerly Alcolapia alcalica

Other scientific names: Oreochromis alcalicus, Sarotherodon alcalica, Sarotherodon alcalicum, Tilapia alcalica

Oreochromis alcalicus, also known as the Alkaline Cichlid, belongs to the Cichlidae family. A remarkable feature of this fish is its ability to survive in conditions that are lethal for most other aquatic creatures: extremely high water temperatures combined with a highly alkaline and mineralized composition. For this reason, the Alkaline Cichlid is rarely found in home aquariums, as its keeping requires specific conditions.

Required aquarium volume
from 100 L
Size in aquarium
11 cm
Temperature
28 – 32 °C
Temperament
Semi-peaceful
Parameters
Temperature28 – 32 °C
Water pHSlightly alkaline (8) – Very alkaline (10)
Water dHMedium hardness (10) – Very hard (35)
Water salinityvery low (up to ~3 g/L)
Size in aquarium11 cm
Lifespan6 years
TemperamentSemi-peaceful
Toward small fishnot a predator
Required aquarium volumefrom 100 L
Lightingmoderate (regular)
Substratesandy (regular, light)
Water flowweak
FeedingPlant-based with meat additives
KeepingHarem

Frequently asked questions

The essentials: size, tank volume, water parameters and care

How big does Alkaline Cichlid get?

An adult reaches 11 cm in length. Plan the tank around the maximum size: the fish quickly outgrows a cramped setup.

What size aquarium does Alkaline Cichlid need?

The recommended volume is 100 L. A smaller tank speeds up nitrate build-up and raises stress levels.

What water parameters does Alkaline Cichlid need?

Temperature 28–32 °C, pH 8–10, hardness 10–35 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does Alkaline Cichlid live?

Around 6 years when kept properly. Lifespan depends directly on tank volume, water quality and a varied diet.

Is Alkaline Cichlid aggressive?

Temperament: semi-peaceful (including aggression during spawning / intraspecific conflicts). Keep this in mind when choosing tank mates.

How many Alkaline Cichlid should be kept together?

Recommended setup: harem (1 male and several females). Ignoring this is a common cause of stress and disease.

What does Alkaline Cichlid eat?

Diet type: plant-based with meat additives. Feed small portions that are finished within a couple of minutes — overfeeding does more harm than underfeeding.

What is the scientific name of Alkaline Cichlid?

The scientific name of the species is Oreochromis alcalicus, family Cichlids (Cichlidae). It also appears in the literature as: Oreochromis alcalicus, Sarotherodon alcalica, Sarotherodon alcalicum.

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