^^^this is the way to a healthy reef tank. People are afraid to feed their fish too much. Within reason, I’ve always followed the mantra that my reef tanks are well fed, well lit fish tanks that happen to have corals. The best reef tanks I’ve seen over 25 years have always had well fed, hearty fish. Even on wild reefs, when the food is gone, the fish are gone and corals decline.Don't feed nori if you're currently feeding it. I don't and my tangs are picking at algae all day long. Turn up the flow and make them work out. But seriously, if your fish can't swim because it's too fat that's one thing, but if it's nice and round, who cares what other people think. Also, it has to do with quality of food and not feeding mysis as your main food source. I feed pellets 5 times a day, flakes once a day and LRS two to three times a day and my fish look good and healthy. It sounds like a lot of food, but these are small portions that get eaten as fast as I throw it in. Herbivores never stop eating during the day and I've seen some pretty chunky tangs on the reefs, so I doubt that your fish are obese, unless you're just feeding mysis, which is a no-no in my book.
Most “help me” threads are always talking about pale corals and other troubles. Then you see their pics and there’s a few fish with a lot of corals and you can see the spines of the fish. That’s not how fish look in the wild. How many people post that their corals are turning brown from feeding too much? Not many at all.