I'm a strong believer in quarantining fishes prior to introducing them to you main aquarium. The logic in this is that by proactively treating a fish for certain diseases the less chance of you introducing it into your active establish aquarium and causing a major catastrophe. It does not take much to quarantine fishes properly. a small 10 gallon and some filter floss from an establish aquarium should be enough to help with the ammonia build up during the quarantine process. Put a ammonia badge on the aquarium to monitor ammonia and if it starts to rise do a large water change. By proper quarantining new arrivals helps alleviate the headaches that most new aquarist encounter during their early years in the hobby.