Check adult requirements
Record the baseline and check adult size and future capacity before purchase. Do not infer the aquarium's condition from a single sign. Confirm scientific identity, adult size, diet, social behaviour and swimming zone.
Then compare adoption, responsible trade or local authority options 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 safe transport without releasing fish, plants or water before continuing. Keep a reference so the result can be compared. Plan the complete group and monitor feeding, breathing, injury, shelter and space use.
Never release aquarium organisms into nature, even with good intentions.