Compatibility Report
GuideMyTank compatibility analysis for Firemouth Cichlid and Red Tail Shark.
Planning verdict
incompatibleDo not plan a shared aquarium for this pair. Choose a different tank mate or maintain separate aquariums.
Firemouth Cichlid and Red Tail Shark receive a not recommended verdict from the current structured assessment. Firemouth Cichlid is recorded as semi-aggressive with an aggression level of 5/10; Red Tail Shark is recorded as semi-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.
Firemouth Cichlid has a recorded temperature range of 75–82°F and pH range of 6.5–8. Red Tail Shark is recorded at 72–79°F and pH 6.5–7.5. Their shared planning window is 75–79°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.
Red Tail Shark sets the larger listed base aquarium requirement at 55 gallons; the other listed minimum is 40 gallons. Firemouth Cichlid is the larger adult by the recorded maximum, reaching 6 inches, compared with 6 inches. These figures are starting constraints, not a stocking-capacity calculation, because the complete group sizes and bioload still matter.
Firemouth Cichlid is a moderate species associated with the mid zone and moderate flow. Red Tail Shark is moderate, uses the bottom zone, and has a moderate flow preference. Firemouth Cichlid does not have a recorded minimum school larger than one, while red tail shark does not have a recorded minimum school larger than one. The aquarium must support both social structures without forcing either species into insufficient space.
Firemouth Cichlid is recorded as a omnivore with intermediate care, while Red Tail Shark is a omnivore with intermediate care. Their listed preferred tank styles are rockwork and rockwork. 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 Firemouth Cichlid and Red Tail Shark.