aptasia

I believe even after extensive safeguards my tank is now infested with aptasia...everything was brand new, rock and sand dry...my three coral frags closely inspected and dipped...I don't believe it was my CuC...as they were added months prior to coral...thoughts?? How much "Spores" does it take...

Hi, Yesterday I noticed my trachyphyllia wasn't doing to well, everything seemed to be okay until yesterday I noticed it was either bleaching or showing skeleton. I moved it too a lower light and lower flow area of the tank so see if this helped as it had been sat in my sand below an MP10. Today...