I can't help you with your question, but have to say you have my admiration. I had a 55 gallon salt water setup for 10 years or so. The entire time I struggled to keep the environment stable and the fish and other animals alive.
I always wanted to go with a larger tank, to make keeping a stable environment easier, but at the time, didn't have the means. Now that I have the means, I don't have the time a salt water tank requires. Best of luck to you.