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Fish Freshwater Care: medium Semi-aggressive

Rusty Cichlid

Iodotropheus sprengerae
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Other names: Rusty, Lavender Mbuna, Iodotropheus, Sprengerae
Group: Malawi cichlids · Family: Cichlidae · Origin: East Africa — Lake Malawi, islands in the southeast arm (around Boadzulu)

A plain but elegant mbuna with a rust-brown body and a purple-lavender sheen. One of the most peaceful mbuna; it stays around 10 cm and can be the core species of a calm Malawi community.

Will it suit my tank?

Last updated October 16, 2026

Temperature
24–27°C
pH
7.6–8.6
Hardness
10–20 dGH
Adult size
10 cm
Minimum tank size
200 liters
Lifespan
6–10 years
Social structure
Harem (one male, several females)
Group
at least 4, ideally 8+
Male–female ratio
1 erkek : 3–4 dişi
Swimming zone
All levels
Diet
Omnivore
Breeding
Mouthbrooder

Water parameters

Temperature24–27°C
pH7.6–8.6
General hardness (GH)10–20 dGH
Recommended range
Eats shrimp Eats snails Damages plants

Overview

October 16, 2026 · Suggest an edit

The rusty cichlid gets its name from the rust-brown color of its body. Under light, a purple-lavender sheen shows on the head and fins. Although it looks plain next to the showy blue and yellow mbuna, it adds a different tone to a Malawi aquarium that aims for color variety.

Its real value lies in its temperament: it is one of the calmest mbuna species and rarely seriously attacks other species. Together with the yellow lab, it is among the first choices for those who want to set up a calm mbuna community. Because of this calmness, it can be bullied when kept with very aggressive species.

Natural Habitat

October 16, 2026 · Suggest an edit

It lives on the rocky shores of the small islands in the southeast arm of Lake Malawi (around Boadzulu). It scrapes the algae layer on the rocks and picks up the small invertebrates within it. The water is hard, alkaline and stable.

Tank Setup

October 16, 2026 · Suggest an edit
  • Volume: at least 200 liters and 100–120 cm in length for a harem and a few mbuna of similar temperament.
  • Rockwork: Many caves and crevices; since it is a calm species, places where it can hide are important.
  • Water: Hard and alkaline (pH 7.8–8.5); aragonite substrate or Malawi salt.
  • Maintenance: Strong filtration, weekly 30–50% water changes.

Diet

October 16, 2026 · Suggest an edit

Omnivorous, with an emphasis on algae and plant-based food. A spirulina-based mbuna food should be the staple, and brine shrimp or mysis can be added a few times a week. Bloodworms and foods containing mammalian meat should be avoided.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

A peaceful mbuna; males display to each other, but fights are brief. It is rarely aggressive toward other species. In the same aquarium as aggressive mbuna, it hides constantly and its colors fade.

Good companions: yellow lab, saulosi, yellow-tail acei, maingano, socolofi, Synodontis catfish suited to hard water.

Avoid: very aggressive mbuna such as kenyi, elongatus, auratus and chipokae, large predatory haps, community fish, shrimp and snails.

Group and Colony Structure

October 16, 2026 · Suggest an edit
  • Harem: 1 male and 3–4 females; thanks to its calm temperament, more than one male can also be kept in a large aquarium.
  • Community: A balanced community is built together with harems of 3–4 mbuna species of similar temperament.
  • Not keeping it with another species of similar brown tones prevents unnecessary rivalry between males.

Breeding

October 16, 2026 · Suggest an edit

A mouthbrooder. The male courts in front of a cave; the female picks up the eggs in her mouth and they are fertilized with the help of the egg spots on the male's anal fin. The female carries 10–25 eggs for about 3–4 weeks. It produces fewer fry than other mbuna; the fry hide in rock crevices.

Health and Common Problems

October 16, 2026 · Suggest an edit
  • Malawi bloat: the wrong diet and stress.
  • Bullying: loss of appetite, fading colors and torn fins when kept with aggressive species.
  • Weakness after brooding: after brooding, females should be fed small amounts frequently for a few days.

Sexing

October 16, 2026 · Suggest an edit

The sexes are similarly colored and difficult to tell apart. Males grow slightly larger, carry more prominent yellow egg spots on the anal fin and darken in color during courtship. For reliable sexing, the genital papilla is examined.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

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Change history and contributors
  1. Page created · October 16, 2026