Check adult requirements
Record the baseline and check species-specific range and tolerated seasonal change. Do not infer the aquarium's condition from a single sign. Confirm scientific identity, adult size, diet, social behaviour and swimming zone.
Then compare lower oxygen availability as water warms with livestock needs and recent changes. Look for genuine overlap in water, flow, territory and feeding throughout the year.
Assess compatibility and welfare
Adjust one variable and assess a heatwave response rather than winter planning alone before continuing. Keep a reference so the result can be compared. Plan the complete group and monitor feeding, breathing, injury, shelter and space use.
The summer maximum is often the decisive indoor limit.