Adding a new fish to your pond is not without risk. Placing your new addition into a quarantine tanks is the most effective way to avoid contamination of your existing fish and will aide in surfacing any sleeping infections.
A quarantine tank should maintain a temperature of a minimum 16 degrees Celsius or 61 degrees Fahrenheit or above.
The warmer water speeds up the life cycle of parasites and any infections will show themselves much quicker. New fish should be maintained in quarantine for a minimum of 21 days. One month is preferred. Feeding the quarantined fish should be kept to a minimum if at all during active treatment for parasites or infection.