Compatibility Report
GuideMyTank compatibility analysis for Freshwater Butterflyfish and Glass Catfish.
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 Glass Catfish receive a conditional verdict from the current structured assessment. Freshwater Butterflyfish is recorded as semi-aggressive with an aggression level of 4/10; Glass Catfish 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. Glass Catfish is recorded at 75–80°F and pH 6–7.5. Their shared planning window is 75–80°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.
Freshwater Butterflyfish sets the larger listed base aquarium requirement at 30 gallons; the other listed minimum is 30 gallons. Freshwater Butterflyfish is the larger adult by the recorded maximum, reaching 5 inches, compared with 3 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. Glass Catfish is calm, uses the mid zone, and has a moderate flow preference. Freshwater Butterflyfish does not have a recorded minimum school larger than one, while glass catfish should be planned as a group of at least 6. 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 Glass Catfish is a carnivore 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 Glass Catfish.