Compatibility Report
GuideMyTank compatibility analysis for Freshwater Butterflyfish and Weather Loach.
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.
Freshwater Butterflyfish and Weather Loach receive a conditional verdict from the current structured assessment. Freshwater Butterflyfish is recorded as semi-aggressive with an aggression level of 4/10; Weather Loach 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.
Freshwater Butterflyfish has a recorded temperature range of 73–86°F and pH range of 6.5–7.2. Weather Loach is recorded at 50–77°F and pH 6.5–8. Their shared planning window is 73–77°F for temperature and 6.5–7.2 for pH. A shared aquarium must stay inside the overlap rather than merely touching each species’ outer tolerance.
Weather Loach sets the larger listed base aquarium requirement at 55 gallons; the other listed minimum is 30 gallons. Weather Loach is the larger adult by the recorded maximum, reaching 12 inches, compared with 5 inches. These figures are starting constraints, not a stocking-capacity calculation, because the complete group sizes and bioload still matter.
Freshwater Butterflyfish is a moderate species associated with the top zone and low flow. Weather Loach is active, uses the bottom zone, and has a low flow preference. Freshwater Butterflyfish does not have a recorded minimum school larger than one, while weather loach should be planned as a group of at least 3. The aquarium must support both social structures without forcing either species into insufficient space.
Freshwater Butterflyfish is recorded as a carnivore with advanced care, while Weather Loach is a omnivore with intermediate care. Their listed preferred tank styles are blackwater 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.
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 Freshwater Butterflyfish and Weather Loach.