I have a small colony of bam-bam's that I have had now for a few months, and over the past 3 to 4 weeks they have not been opening up. All other zoanthids in the tank are doing great (even some on the same rock), just not the bam-bams. Any suggestions? I had even fragged off a few polyps after getting the colony and they stopped opening up about the same time. Are these just more finicky than other zoos, or what can I do to get them back to the beautiful orange that they used to be?