THe only thing I'd recommend against if you go with wrasses in a 90 is any damsels. They start out all cute and small, then they grow up and get mean. Even if they're relatively docile towards other fish, the chasing they do with each other can spook wrasses enough to cause them to jump. And since the only physical law reef tanks follow is Murphy's law, said wrasses will always find the one tiny spot in your cover that you never knew a fish could fit through.
And Voila, floor jerky.
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