Compatibility Report
GuideMyTank compatibility analysis for Green Severum and Ranchu 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.
Green Severum and Ranchu Goldfish receive a conditional verdict from the current structured assessment. Green Severum is recorded as semi-aggressive with an aggression level of 5/10; Ranchu 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.
Green Severum has a recorded temperature range of 75–84°F and pH range of 6–7.5. Ranchu Goldfish is recorded at 65–75°F and pH 7–8. Their shared planning window is 75–75°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.
Green Severum sets the larger listed base aquarium requirement at 75 gallons; the other listed minimum is 30 gallons. Green Severum is the larger adult by the recorded maximum, reaching 10 inches, compared with 8 inches. These figures are starting constraints, not a stocking-capacity calculation, because the complete group sizes and bioload still matter.
Green Severum is a moderate species associated with the mid zone and moderate flow. Ranchu Goldfish is calm, uses the mid zone, and has a low flow preference. Green Severum does not have a recorded minimum school larger than one, while ranchu 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.
Green Severum is recorded as a omnivore with intermediate care, while Ranchu Goldfish is a omnivore with advanced care. Their listed preferred tank styles are community 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 Green Severum and Ranchu Goldfish.