Compatibility Report
GuideMyTank compatibility analysis for Harlequin Rasbora and Oranda Goldfish.
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.
Harlequin Rasbora and Oranda Goldfish receive a conditional verdict from the current structured assessment. Harlequin Rasbora is recorded as peaceful with an aggression level of 1/10; Oranda Goldfish 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.
Harlequin Rasbora has a recorded temperature range of 73–82°F and pH range of 6–7.5. Oranda Goldfish is recorded at 65–75°F and pH 7–8. Their shared planning window is 73–75°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.
Oranda Goldfish sets the larger listed base aquarium requirement at 30 gallons; the other listed minimum is 20 gallons. Oranda Goldfish is the larger adult by the recorded maximum, reaching 8 inches, compared with 2 inches. These figures are starting constraints, not a stocking-capacity calculation, because the complete group sizes and bioload still matter.
Harlequin Rasbora is a active species associated with the mid zone and moderate flow. Oranda Goldfish is calm, uses the mid zone, and has a low flow preference. Harlequin Rasbora should be planned as a group of at least 8, while oranda goldfish does not have a recorded minimum school larger than one. The aquarium must support both social structures without forcing either species into insufficient space.
Harlequin Rasbora is recorded as a omnivore with easy care, while Oranda Goldfish is a omnivore with intermediate care. Their listed preferred tank styles are blackwater and goldfish. 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 Harlequin Rasbora and Oranda Goldfish.