I don't have one for my older tank. Quite honestly, it's a modest tank, that most people wouldn't be super impressed by. It doesn't even have fish in it right now, though I've been meaning to add some back. Lost my tang of 19 years last year, and just haven't had the heart to replace him.
I started the tank about.. 20 years ago, 125 with DSB, about 4" of agagonite. It got almost completely wiped out once by an AC failure that drove the temp over the 90's for a few days, but it's the same rocks and sandbed. I moved into a new house about 10-12 years ago, and moved the sand/rocks with the tank, and kept it all alive. Right now it just houses a few soft corals, because I was concentrating on the big tank for so long. But the bed is still alive and kicking. But I should note.. no water changes, umm, ever really.. I guess when I moved, that was a water change. And no skimmer. Just a DSB, and currently, a remote DSB with chaeto sump. I don't go around recommending my waterchange/skimmer methods to people, because I don't like to argue about it, and I want very specific results, and they aren't for everyone.
I cringe every time I see "I started the tank a month ago, added corals, and now I have this problem". I'm not kidding when I say I cycle tanks for nearly a year. I really do think that's the best method, but most people don't have my patience. I want my bed to be deeply stable by the time anything gets added.