Compatibility Report
GuideMyTank compatibility analysis for Guppy and Oscar.
Planning verdict
incompatibleDo not plan a shared aquarium for this pair. Choose a different tank mate or maintain separate aquariums.
Guppy and Oscar receive a not recommended verdict from the current structured assessment. Guppy is recorded as peaceful with an aggression level of 1/10; Oscar is recorded as aggressive with an aggression level of 6/10. 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. Oscar is recorded at 74–81°F and pH 6–7.5. Their shared planning window is 74–81°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.
Oscar sets the larger listed base aquarium requirement at 75 gallons; the other listed minimum is 10 gallons. Oscar is the larger adult by the recorded maximum, reaching 14 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. Oscar is moderate, uses the mid zone, and has a moderate flow preference. Guppy should be planned as a group of at least 3, while oscar does not have a recorded minimum school larger than one. The aquarium must support both social structures without forcing either species into insufficient space.
Guppy is recorded as a omnivore with easy care, while Oscar is a carnivore with intermediate care. Their listed preferred tank styles are planted and predator. 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.
Do not plan a shared aquarium for this pair. Choose a different tank mate or maintain separate aquariums.
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 Oscar.