I guess in part it depends on the definition of "reef" in relation to "reef safe". I have a Trigger tank with a Pink Tail, Clown, Blue Chin and Humuhumu. I have Mushrooms, Palys and Leather Toadstools in there that are all doing fine. Some nasty crabs for clean up crew that are safe in that they hide most of the time. As for "ornamental" inverts, I haven't even considered going there as I'm pretty sure I know what the results would be. So is this tank a reef? I don't like to call it that because my other tank is a reef, but I suppose it is a form of one.
HTH and cheers,
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Mark.
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