Compatibility Report
GuideMyTank compatibility analysis for Common Goldfish and Moonlight Gourami.
Planning verdict
incompatibleDo not plan a shared aquarium for this pair. Choose a different tank mate or maintain separate aquariums.
Common Goldfish and Moonlight Gourami receive a not recommended verdict from the current structured assessment. Common Goldfish is recorded as peaceful with an aggression level of 1/10; Moonlight Gourami 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.
Common Goldfish has a recorded temperature range of 60–75°F and pH range of 7–8.4. Moonlight Gourami is recorded at 77–86°F and pH 6–7.5. Their shared planning window is no complete overlap in the recorded ranges for temperature and 7–7.5 for pH. A shared aquarium must stay inside the overlap rather than merely touching each species’ outer tolerance.
Common Goldfish sets the larger listed base aquarium requirement at 75 gallons; the other listed minimum is 30 gallons. Common Goldfish is the larger adult by the recorded maximum, reaching 12 inches, compared with 6 inches. These figures are starting constraints, not a stocking-capacity calculation, because the complete group sizes and bioload still matter.
Common Goldfish is a moderate species associated with the mid zone and moderate flow. Moonlight Gourami is calm, uses the top zone, and has a low flow preference. Common Goldfish does not have a recorded minimum school larger than one, while moonlight gourami does not have a recorded minimum school larger than one. The aquarium must support both social structures without forcing either species into insufficient space.
Common Goldfish is recorded as a omnivore with easy care, while Moonlight Gourami is a omnivore with easy care. Their listed preferred tank styles are goldfish 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.
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 Common Goldfish and Moonlight Gourami.