In the main post you said:
This is a little confusing. Caulerpa is the only disallowed macroalgae? Or, what is the exception macro that
is allowed (and why are almost all disallowed)?
If Caulerpa spp. is the only disallowed type of macro, here's a question: I have a piece of blue hypnea, which is priced decently high and grows pretty slow, can I bring that as a bonus? TSA has priced it at $50 for a 1" ball, which is sort of in line with certain other corals. I also have not seen this at all in this club, and it should probably be in the hands of a reefer who is better at macroalgae than I.
Blue Hypnea is a blue, slow growing macroalgae. You will receive a 1″ – 1.5″ ball of Blue Hypnea. It prefers higher Light and Flow.
topshelfaquatics.com