There are 2 species of Blasto, Merletti and Welsi. There are many different color varieties in both species. There are several species of acanthastrea(at least 6, but I cant remember exactly how many). They also mave many different color varieties of each species.
If you can find a nice acan, I'd say go for it!
Chris
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No more tanks  - Laying off the ReefCrack for awhile!
Cheers,
Chris
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