Compatibility Report
GuideMyTank compatibility analysis for Betta and Golden Wonder Killifish.
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.
Betta and Golden Wonder Killifish receive a conditional verdict from the current structured assessment. Betta is recorded as semi-aggressive with an aggression level of 6/10; Golden Wonder Killifish is recorded as semi-aggressive with an aggression level of 4/10. The recommendation is based on the combined water, space, behavior, grouping, and predation checks below rather than on species names alone.
Betta has a recorded temperature range of 76–82°F and pH range of 6.5–7.5. Golden Wonder Killifish is recorded at 72–82°F and pH 6.5–7.5. Their shared planning window is 76–82°F for temperature and 6.5–7.5 for pH. A shared aquarium must stay inside the overlap rather than merely touching each species’ outer tolerance.
Golden Wonder Killifish sets the larger listed base aquarium requirement at 20 gallons; the other listed minimum is 5 gallons. Golden Wonder Killifish is the larger adult by the recorded maximum, reaching 4 inches, compared with 3 inches. These figures are starting constraints, not a stocking-capacity calculation, because the complete group sizes and bioload still matter.
Betta is a calm species associated with the top zone and low flow. Golden Wonder Killifish is moderate, uses the top zone, and has a moderate flow preference. Betta does not have a recorded minimum school larger than one, while golden wonder killifish does not have a recorded minimum school larger than one. The aquarium must support both social structures without forcing either species into insufficient space.
Betta is recorded as a carnivore with easy care, while Golden Wonder Killifish 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.
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 Betta and Golden Wonder Killifish.