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Unread 06/09/2009, 05:10 AM   #8
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Join Date: Dec 2004
Posts: 144
I think this particular species of sponge is symbiotic with cyanobacteria like corals with zooxanthellae...Anthony Calfo told me this at his visit to Greece.I am almost sure it was that sponge.There was in a 500G tank , it kept an area of 10 inches, and it didn't have to do anything with cyano occurence, though....

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