Compatibility Report
GuideMyTank compatibility analysis for Clown Killifish and Guppy.
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.
Clown Killifish and Guppy receive a conditional verdict from the current structured assessment. Clown Killifish is recorded as peaceful with an aggression level of 1/10; Guppy is recorded as peaceful with an aggression level of 1/10. The recommendation is based on the combined water, space, behavior, grouping, and predation checks below rather than on species names alone.
Clown Killifish has a recorded temperature range of 68–79°F and pH range of 5–7. Guppy is recorded at 72–82°F and pH 7–8. Their shared planning window is 72–79°F for temperature and 7–7 for pH. A shared aquarium must stay inside the overlap rather than merely touching each species’ outer tolerance.
Guppy sets the larger listed base aquarium requirement at 10 gallons; the other listed minimum is 5 gallons. Guppy is the larger adult by the recorded maximum, reaching 2 inches, compared with 1.4 inches. These figures are starting constraints, not a stocking-capacity calculation, because the complete group sizes and bioload still matter.
Clown Killifish is a calm species associated with the top zone and moderate flow. Guppy is moderate, uses the top zone, and has a moderate flow preference. Clown Killifish should be planned as a group of at least 6, while guppy should be planned as a group of at least 3. The aquarium must support both social structures without forcing either species into insufficient space.
Clown Killifish is recorded as a carnivore with intermediate care, while Guppy is a omnivore with easy care. Their listed preferred tank styles are blackwater and planted. 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 Clown Killifish and Guppy.