Compatibility Report
GuideMyTank compatibility analysis for Guppy and Keyhole Cichlid.
Planning verdict
cautionOnly plan this pair if every listed condition can be met, and have a separation plan if stress or aggression appears.
No automatic safety blocker was found.
Guppy and Keyhole Cichlid receive a conditional verdict from the current structured assessment. Guppy is recorded as peaceful with an aggression level of 1/10; Keyhole Cichlid is recorded as peaceful with an aggression level of 2/10. The recommendation is based on the combined water, space, behavior, grouping, and predation checks below rather than on species names alone.
Guppy has a recorded temperature range of 72–82°F and pH range of 7–8. Keyhole Cichlid is recorded at 72–79°F and pH 6–7.5. Their shared planning window is 72–79°F for temperature and 7–7.5 for pH. A shared aquarium must stay inside the overlap rather than merely touching each species’ outer tolerance.
Keyhole Cichlid sets the larger listed base aquarium requirement at 30 gallons; the other listed minimum is 10 gallons. Keyhole Cichlid is the larger adult by the recorded maximum, reaching 4 inches, compared with 2 inches. These figures are starting constraints, not a stocking-capacity calculation, because the complete group sizes and bioload still matter.
Guppy is a moderate species associated with the top zone and moderate flow. Keyhole Cichlid is calm, uses the mid zone, and has a moderate flow preference. Guppy should be planned as a group of at least 3, while keyhole cichlid should be planned as a group of at least 2. The aquarium must support both social structures without forcing either species into insufficient space.
Guppy is recorded as a omnivore with easy care, while Keyhole Cichlid is a carnivore with easy care. Their listed preferred tank styles are planted and blackwater. Feeding access, cover, open swimming room, filtration, and observation should be planned around the more demanding requirement rather than averaged between the two species.
Use these pair-specific boundaries before treating the verdict as an acceptable stocking plan.
Only plan this pair if every listed condition can be met, and have a separation plan if stress or aggression appears.
These references support the underlying species records used by this assessment. They do not necessarily evaluate this exact pair together.
Continue with the most relevant care and compatibility resources for Guppy and Keyhole Cichlid.