Hydroids and Peroxide

[Ian Baxter]

I have a ton of hydroids in my tank that have spread like wildfire. I have one giant rock with no corals that I am going to scrub (outside of the tank) and peroxide dip. I believe it's 1:1 w/ saltwater for 5-10 minutes. I also am going to get a sea hare and possibly 2 fringeback nudis. My tank is a 190g. I also have some good sized rocks with mushrooms and a toadstool leather on them. Can I peroxide dip those too? I'm 99% sure they are colonial hydroids.

 

[BryanM]

Pics under white lights would allow others to confirm.

As for the dip, the coral free rock is fine, but the rocks with corals on them, that strong of a dip will burn the corals.

I also don't think Seahares touch hydroids, and I can't imagine 2 nudis being able to do very much damage in a 190g tank.... And if you have a wrasse, they will likely be a tasty meal for the wrasse.