Oh FWIW, another observation. Some of my fish seem to enjoy eating the mulm. So it's not just coral food, it's fish food too.
The mulm production is INSANE. I hope it's doing good for inhabitants because there is a lot of it and it does increase your skimmer output. So the downside is more work, the filter socks need cleaning twice as often and the skimmer needs cleaning more often as well. Wish I had a wetneck skimmer.