Ive had the clarion for close to 2 years now. Hes surprising mellow, save a few species, which he absolutely cannot stand (regal angels, being one of them). I feed very heavily. Nori every 2 days, at least (usually every day), pellets on an autofeeder (Hikari, NLS, Microcrabs, Kent reef herbivore, Omega One), cyclopeeze/sprulina flake when I get home from work, and frozen at about 8ish or so (PE mysis, Hikari mysis, formula cubes, squid, clam).
A personal mantra of mine is to never have fish in an emaciated state. I feed heavily, and strive for them to be robust, like they are in the wild. I have an enormous skimmer, run carbon, ozone, do religous water changes to combat nutrient issues. I run the tank bteween 72 and 73, which definitely slowe dthe SPS growth, but also shifted color to a little paler colors, too.