This tool provides a general estimate and does not replace professional veterinary advice.
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What is the Cichlid Stocking Level Calculator?
The Cichlid Stocking Level Calculator calculates how many cichlids can safely be stocked in a given tank size. Undersized housing is one of the most common and most fixable welfare problems in pet keeping, it affects everything from stress levels to exercise to litter/waste management.
Expect roughly 8-12 years with a cichlid, which is worth factoring into any long-term plan. As an omnivore, what a cichlid needs from its diet changes across its life stages. Cichlid needs vary sharply by origin: African rift lake species want hard alkaline water and rockwork, South American species want soft acidic water. Most are territorial and need stocking planned to spread aggression. Keep an eye out for Malawi bloat, aggression injuries, hole-in-the-head disease. These are the conditions cichlids are most commonly seen for.
Cichlid quick facts
| Measure | Cichlid |
|---|---|
| Typical lifespan | 8–12 years |
| Diet | Omnivore |
| Mature at | About 1 years |
| Clutch size | 300–600 eggs |
How does the Cichlid Stocking Level Calculator work?
The recommendation is based on published care-guide minimums for cichlids, scaled to the animal's current or expected adult size. Individual cichlids vary more than averages suggest, so read the number as a reference point rather than a measurement.
What changes the answer
- Adult size: housing should be sized for the animal's full-grown dimensions, not its current size if still young
- Number of animals being housed together, since space needs don't simply divide evenly
- Activity level and natural behavior, such as climbing, digging or swimming space
- Whether the space is temporary (travel/carrier) or permanent (everyday housing)
How do you use the Cichlid Stocking Level Calculator?
- Enter the tank volume in whichever unit you use (US gal, L, UK gal)
- Enter the adult body length in whichever unit you use (in, ft, cm)
- Pick your filtration and planting (Standard filter, no live plants, Strong filter or heavily planted, Minimal filtration)
- Press Calculate, then read the result alongside the sources listed below
One practical habit: revisit this every few months rather than checking once. Cichlids change as they age, and the right answer changes with them.
For related questions, see the other housing tools or browse every cichlid tool.
Before you rely on this
One number on one day is rarely the full picture. What matters more is the direction of travel: whether your cichlid is trending steadily, drifting, or changing suddenly. A sudden change is always worth a call to your vet, even when the individual figure still falls inside a normal range.
Sources and references
The formulas, reference ranges and species data behind the Cichlid Stocking Level Calculator come from these veterinary references, professional bodies and published research.
- RSPCAAdvice and Welfarerspca.org.uk(opens in a new tab)
- Merck Veterinary ManualExotic and Laboratory Animalsmerckvetmanual.com(opens in a new tab)
- pdsa.org.ukPDSA Pet Health Hubpdsa.org.uk(opens in a new tab)
- University of Florida IFAS ExtensionAquacultureedis.ifas.ufl.edu(opens in a new tab)
- Merck Veterinary ManualRoutine Care and Breedingmerckvetmanual.com(opens in a new tab)
- Built on veterinary referencesFormulas and ranges come from veterinary manuals, university research and welfare bodies, listed above for you to check.
- Instant resultsNo page reload, no waiting and no account. Enter your details and the result appears straight away.
- Private by designCalculations run in your browser. Nothing you enter is stored on our servers or shared with anyone.
- Always freeEvery XpertsPet tool is free to use, with no premium tier and nothing to sign up for.