Can anyone here give me a hypothesis on why certain colonies get them? I concluded after loosing 3-4 colonies and having two colonies now infected. I tried iodine dips, high flow, low light, and last is vitamin C dosing, nothing every helped besides fragging a healthy piece. I noticed I fragged smaller pieces of both colonies 2 weeks before noticing the poks on the mother colonies. The fragged pieces were placed with med flow on the bottom of the tank and the mother mid level high flow. The frags show small signs of poks now too, even placed in diffrent areas. These pieces were wild and in the tank for about a month. Thanks ***Anyone have a cure? ha,ha,ha If you do I'd be very impressed! If so post it on RC.