African Cichlid Care
Lake-by-Lake UK Guide
African Rift Lake cichlids are ideal for UK hobbyists — they thrive in hard, alkaline water that matches most UK tap supplies without treatment. This guide covers species selection, parameters by lake, UK water compatibility, and how to manage aggression.
By Adnan, Lead Installer & Cichlid Specialist, AD Aquatics · Updated 2025
Why African Cichlids Suit UK Tap Water
The African Great Rift Lakes — Malawi, Tanganyika, and Victoria — contain some of the hardest, most alkaline freshwater on Earth. Lake Malawi has pH 7.8–8.5, GH 12–20°dH; Lake Tanganyika reaches pH 8.0–9.0 with GH 10–14°dH. This closely matches the hard water supplied across much of England, particularly the southeast, midlands, and east.
This makes African cichlids the single best choice for UK hobbyists in hard water areas who want large, colourful, personality-rich fish without the complexity of water treatment. In contrast, softwater species like discus require reverse osmosis equipment in most UK regions. See our UK tap water hardness guide for regional data.
Water Parameters by Lake
| Lake | pH | Temperature (°C) | GH (°dH) | KH (°dH) | Key Genera | Character |
|---|---|---|---|---|---|---|
| Lake Malawi | 7.8–8.5 | 24–28 | 12–20 | 8–15 | Mbuna, Peacocks (Aulonocara), Haps (Haplochromis group) | High aggression (mbuna); moderate–peaceful (Peacocks/Haps) |
| Lake Tanganyika | 8.0–9.0 | 24–27 | 10–14 | 10–18 | Neolamprologus, Julidochromis, Tropheus, Cyphotilapia (Frontosa) | Generally more peaceable; strong pair-bonding; shellies colony-based |
| Lake Victoria | 7.5–8.5 | 22–26 | 8–16 | 5–12 | Haplochromis spp. (many species complex) | Less commonly kept; many species critically endangered |
Lake Malawi: Species & Stocking Guide
Malawi is divided into three main groups — mbuna (rock dwellers), Peacocks (mid-water open spawners), and Haps (large open-water hunters). Each group has different temperament and water use:
Mbuna (Rock Dwellers)
- Pseudotropheus zebra complex — classic Malawi mbuna; multiple colour morphs; highly aggressive
- Labidochromis caeruleus (Yellow Lab) — the most peaceful mbuna; excellent community fish
- Metriaclima estherae (Red Zebra) — striking red/orange females; moderate aggression
- Cynotilapia afra — smaller, less aggressive mbuna; suits smaller tanks (150 L+)
- Iodotropheus sprengerae (Rusty Cichlid) — purple/brown colouration; moderate temperament
Mbuna stocking rule: Keep 15–20 fish in 200 litres with dense rock cover. One male per species (unless tank is 300 L+). Multiple females per male. All-male tanks are an alternative but require careful monitoring.
Peacocks (Aulonocara spp.)
- Aulonocara baenschi (Sunshine/Benga Peacock) — stunning yellow-blue; peaceful
- Aulonocara stuartgranti (Flavescent/Ngara Peacock) — blue-yellow; peaceful
- Aulonocara jacobfreibergi (Eureka/Fairy Cichlid) — blue with red/orange tail; semi-aggressive
Peacocks suit mixed Peacock/Hap tanks at lower densities (8–12 fish per 200 L) with open swimming space and moderate rock cover. Less aggressive than mbuna — do not mix Peacocks into a mbuna-dominated tank.
Haps (Haplochromis Group)
- Copadichromis azureus — electric blue males; open-water schooling
- Protomelas taeniolatus (Red Empress) — large, spectacular; semi-aggressive
- Dimidiochromis compressiceps (Malawi Eye-biter) — predatory; not suitable with small fish
- Nimbochromis venustus (Giraffe Cichlid) — large predator; needs 300+ L
Lake Tanganyika: Species & Stocking Guide
Tanganyika offers more variety in behaviour and ecology than Malawi — from tiny Lamprologus shellfish colony dwellers to the giant Cyphotilapia Frontosa. A multi-species Tanganyikan biotope is one of the most interesting setups in freshwater fishkeeping.
Shellies (Shell-Dwellers)
- Neolamprologus multifasciatus — smallest cichlid species kept; colony-based; suitable for 60 L+
- Neolamprologus brevis — slightly larger shell dweller; pairs well with open-water species above
- Lamprologus ocellatus — single-pair territory; strong personality in a small body
Open-Water Tanganyikans
- Julidochromis transcriptus (Masked Julie) — pair-bonding; excellent for Tanganyika community
- Julidochromis marlieri (Marlier's Julie) — similar but larger; more territorial
- Tropheus duboisi (White Spotted Tropheus) — stunning but extremely aggressive intraspecifically; keep as a large group of 15+
- Cyphotilapia frontosa (Frontosa) — slow, majestic; requires 300+ L; peaceful despite large size
Aggression Management
Adnan's key rule: aggression in mbuna is inversely proportional to fish density. A sparse tank with 5–6 mbuna is more dangerous than a properly stocked tank of 18–20. When a dominant male cannot focus aggression on one target, it spreads across the group and no individual is pursued to death.
- Rock density: Provide at least one cave entrance per fish — more is better. Build rocks to the waterline to break line of sight
- Species ratio: Never keep more than 1 male of the same species unless the tank is 300 L+
- Female ratio: Aim for 3–4 females per male; females are often equally coloured in some species (e.g. Yellow Lab — both sexes are yellow)
- Adding new fish: Rearrange rocks and turn off lights when adding new fish to reset territories
- Remove persistent bullies: Occasionally one individual is irrationally aggressive — remove it and watch the tank settle
Frequently Asked Questions
Can I mix Lake Malawi and Tanganyika cichlids?
No — this is strongly advised against. Although water parameters overlap, the species have incompatible behaviours and social structures. Aggressive Malawi mbuna will harass more peaceable Tanganyikans. Keep each lake as a single-lake biotope.
Do African cichlids need special water in the UK?
Generally no — most UK tap water matches or closely approaches Rift Lake parameters. Southeast England, East Anglia and much of the Midlands supply water at GH 12–25°dH that is ideal for African cichlids. Only very soft UK regions (parts of Wales, Scotland) may need mineral supplementation. See our UK water guide.
How many cichlids can I keep in a 200-litre tank?
For mbuna: 15–20 fish at adult size, with rocks covering approximately 50% of the tank floor. For Peacocks/Haps: 8–12 fish at lower density with more open swimming space. For Tanganyikans: depends entirely on species mix — a Frontosa-based tank needs far fewer fish than a shelly/Julie biotope.
Why is my cichlid not eating?
Refusing food in cichlids often indicates: holding (mouthbrooding female will not eat for 3–4 weeks), illness (Malawi bloat or internal parasites — check for distended abdomen), recent introduction stress, or aggression-induced stress from tankmates. Test water quality first, then observe for physical symptoms. Contact AD Aquatics if you need remote diagnosis support — get in touch.
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