I bought a chalice frag that had 1 eye at time of purchase. A month went by and I noticed another eye forming. Within the last few days The new eye has dissipated and tissue is receding toward the original eye. I test for alk: 9 dkh cal:400 temp: 79-80, and I have never been able to register nitrates on my red sea kit. I run carbon and gfo and skim. I dose 10 ppm of BRS 2 part once daily. All of my other corals SPS and LPS are doing well. The chalice is on the sand bed under 250k radium. I feed rods food once a day. Any ideas as to what could be causing this?