I have a port jackson pup in a 120 right now... I bought a 220... is there a safe way to make the transition to the new tank without hurting the fish or do I just need to set it up and let it sit 6-8 weeks and then put him in? NEED ADVICE. This fish is like a puppy-dog to me so need to do this properly but really want to put the new tank where the old one sits now