Any body with digitate hydroids specifically I can say without a doubt that reef roids will make them explode. I had plague proportions when my tank started. And dosed fenbendezole which killed them at least I thought for good. 2 years later I started trying reef roids again and bang all over tank. I immediately stopped and already subsiding down to a few. As far as the fenbendezole I will never do again it negatively effected my tank chemistry for well over a year. My GSP still doesn’t even grow. Never hurt SPS though
