I just found what appears to be a patch of Colonial Hydroids in my reef tank. I’ve never noticed them in the past 7-8 years, they just kind of popped up. Not until I changed my lighting over to LEDs did I notice them. Now they kind of glow during sunrise and sunset of my tank (most actinic). Many fellow reefers say they’ve had a lot of problems with them but if I’m just now noticing them maybe they won’t move like wild fire. Have any of you had problems with they in your saltwater tank?