ORayRay
New member
I recently had some 2 zoa frags covered in brown hydroids, I looked around and could not find anything on how to get rid of them. Instead of tossing them out I decided to do a high concentrated dip in some hydrogen peroxide, I didn't measure it but I'm guessing it was around 30-40%. I let them soak for around 25 mins, it was too the point where some of the polyps had bubbles in them and the frag floated, I then dipped them in an iodine dip for another 10 mins before rinsing and returning them to the tank, the next day to my surprise both frags were hydriod free 
Considering the one of the frags still has a bunch of polyps still closed I only recommend this as a last resort, I used this dip knowing that is could have killed the frag, please use at your own risk
Considering the one of the frags still has a bunch of polyps still closed I only recommend this as a last resort, I used this dip knowing that is could have killed the frag, please use at your own risk