Can Demasoni Cichlid (Mbuna) and Siamese Algae Eater Live Together?

🔴Not Recommended

Demasoni Cichlid (Mbuna) and Siamese Algae Eater are not recommended as tank mates due to conflicting pH requirements. Housing these species together is likely to result in stress, health problems, or direct harm to one or both fish.


At a Glance

Demasoni Cichlid (Mbuna)

Chindongo demasoni

Siamese Algae Eater

Crossocheilus oblongus

🐠Family Group
Demasoni Cichlid (Mbuna)
Cichlids - African
Siamese Algae Eater
Cyprinids
Temperament
Demasoni Cichlid (Mbuna)
Highly Aggressive (9/10)
Siamese Algae Eater
Mostly Peaceful (3/10)
Temperature
✓ Compatible
Demasoni Cichlid (Mbuna)
24–28°C
Siamese Algae Eater
22–28°C
pH Range
✗ No overlap
Demasoni Cichlid (Mbuna)
7.6–8.6
Siamese Algae Eater
6–7.5
Hardness (dGH)
✓ Compatible
Demasoni Cichlid (Mbuna)
10–25
Siamese Algae Eater
5–15
Water Type
✓ Compatible
Demasoni Cichlid (Mbuna)
Freshwater Only
Siamese Algae Eater
Freshwater Only
Flow Preference
✓ Compatible
Demasoni Cichlid (Mbuna)
High
Siamese Algae Eater
Moderate
Min Tank Volume
Combined: 240 L
Demasoni Cichlid (Mbuna)
200 L
Siamese Algae Eater
110 L
Swimming Level
Shared: 2 zones
Demasoni Cichlid (Mbuna)
BottomMiddle
Siamese Algae Eater
BottomMiddle
🏷️Behavior Tags
Demasoni Cichlid (Mbuna)
Aggressive to same species/look-alikesTerritorial (Defends specific area)Plant DestroyerDigger (Disturbs Substrate)Hyperactive / Fast SwimmerGenerally Aggressive
Siamese Algae Eater
Hyperactive / Fast SwimmerJumper (Lid Required)Aggressive Eater (Starves shy fish)Territorial (Defends specific area)

Behaviour & Temperament

Demasoni Cichlid (Mbuna) is a highly aggressive species (9/10), while Siamese Algae Eater is generally mild-mannered (3/10). This notable difference means Demasoni Cichlid (Mbuna) may occasionally assert dominance over Siamese Algae Eater.

Large aggression gap (6 points) between Demasoni Cichlid (Mbuna) and Siamese Algae Eater increases stress risk for the more peaceful fish.

Demasoni Cichlid (Mbuna) and Siamese Algae Eater both frequent the Bottom (Substrate) and Middle (Open Water) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.

Additional behavioural considerations to keep in mind: Two territorial species may clash over territory, especially in smaller tanks.

Worth noting: Siamese Algae Eater is a known jumper, so a tight-fitting lid is essential.

Water Parameters

The safe temperature window for both species falls between 24°C and 28°C. Aim for the midpoint of this range (around 26.0°C) for optimal comfort.

The pH requirements of Demasoni Cichlid (Mbuna) (7.6–8.6) and Siamese Algae Eater (6–7.5) do not overlap, making it impossible to satisfy both species simultaneously.

For general hardness, the shared comfort zone is 10–15 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.

Tank Setup

To house Demasoni Cichlid (Mbuna) and Siamese Algae Eater together, plan for an aquarium of at least 240 litres with a minimum length of 120 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.

Providing a mix of open swimming space and sheltered areas with rocks, driftwood, or plants will keep both species comfortable and allow natural behaviour.

Specific environmental needs for this combination include: Sand (Sifters), Established Algae (Otocinclus), Driftwood (Digestion/Hiding), Plants - lighly covered. Meeting these requirements will help both species thrive.

Note a potential conflict in setup requirements: Demasoni Cichlid (Mbuna) is a plant destroyer, which conflicts with Siamese Algae Eater's requirement for live plants. Compromise where possible or prioritise the more critical need.

Both species do well with high (river/stream) water movement, so a standard filtration setup rated for the tank volume should suffice.

Find the right tank equipment

Browse tanks, décor, and equipment suited for this setup.

Frequently Asked Questions

Can Demasoni Cichlid (Mbuna) and Siamese Algae Eater live together?

No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.

What size tank do Demasoni Cichlid (Mbuna) and Siamese Algae Eater need?

A minimum of 240 litres (tank length at least 120 cm) is recommended. This provides enough space for both species to establish their own areas and reduces the likelihood of territorial disputes.

What water temperature is best for Demasoni Cichlid (Mbuna) and Siamese Algae Eater together?

Keep the aquarium between 24°C and 28°C. A target of around 26.0°C sits comfortably within both species' preferred ranges.

Are Demasoni Cichlid (Mbuna) or Siamese Algae Eater aggressive?

Demasoni Cichlid (Mbuna) is highly aggressive (9/10) and Siamese Algae Eater is generally mild-mannered (3/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.

What pH do Demasoni Cichlid (Mbuna) and Siamese Algae Eater need?

Their pH requirements do not overlap. Demasoni Cichlid (Mbuna) prefers 7.6–8.6, while Siamese Algae Eater needs 6–7.5. This makes them incompatible in the same water chemistry.

How do I manage Demasoni Cichlid (Mbuna)'s territorial behaviour?

Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Demasoni Cichlid (Mbuna) space to claim a territory without encroaching on the other fish's area. Adding décor that divides the tank into distinct zones works especially well.


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