Looks like green star polyps to me, just let them grow, when they start to attach to your rock, add a peice of rubble nest to them, once they grow onto that cut the rubble away. Presto you have a GSP frag.
Looks like green star polyps to me, just let them grow, when they start to attach to your rock, add a peice of rubble nest to them, once they grow onto that cut the rubble away. Presto you have a GSP frag.