I have an occelaris clown that is going to be 18 this year. He was in a 180g reef for 10yrs and then we moved and had to downsize so he has been in a 30g fowlr for the last 8. His mate died last year and I'm in the initial stages of a 90g. Should I continue with the smaller tank for him or move him to the larger tank. I have been afraid to shock him or have others pick on him. Could I move him into the bigger home and introduce another clown? I don't plan on having many fish in the 90 and focus on corals.