Hydroids
 

Do you have hydroids and how concerned are you about them? Any good ways to kill em?

imo hydroids aren't really that bad as far as pests can go. i have em but im not in emergency mode to kill em off.

Got a few patches. Tried kalk paste and really didn't work, so we've come to an agreement, I stop trying to kill them, they'll stop spreading. Truce been holding probably for more than a year.

Other than a chisel about the only other thing I can see working would be a little butune torch.

anyone tryed to hit them with boiling water from a syring while the rock is still in the tank?

I put putty all over them....then they were gone...and then stick a coral over the putty! I didn't have many but enough so I then covered the putty with a small mushroom colony after a week or so to make sure that they were all covered

what do they look like??

They look like tiny little brown zoas. And they sting.

Ah those things, I had some but they packed up and left a long time ago. It sounds like I got lucky on this problem.

hydroidea is a diverse group. hydroids can look like a lot of things from tiny brown zoos, to clear glass like tubes, to fuzz, to single or spider-web like like connected colonies. ignoring of course each species' pelagic hydromedusa stage.

I have 3 or 4 patches in my tank with the biggest patch being about the size of a nickel. I scramble them up with a fork and siphon the bits out every once in a while. I'm at the same place as Mark; I will quit trying to kill them as long as they don't spread.