A forest of hydroids

[Snappy]

Kalk is rumoured to work. I had them bad on one particular coral and they eventually went away but my h2o is low nutrient.

[sharuq1]

You could try putting kalk or joe's juice all over them. I had this problem really bad on one of my rocks once and had no kalk/juice to take care of it, sadly I had to torch the rock with a blow torch to kill them (also had to torch some bad algae I couldn't get rid of but that is another tale), and you know what? frickin buggers...some still lived, lol!

If you want to go double on their hydroid butts juice/kalk them and then cover them with putty or something. I don't think much could survive that...I would hope...

[marie]

Originally Posted by Snappy

Kalk is rumoured to work. I had them bad on one particular coral and they eventually went away but my h2o is low nutrient.

If I kalked every hydroid in my tank, the resulting precipitation snow storm would make my tank look like the east coast in the winter .

I'm pretty sure it is because of my recent nutrient problems that I'm having problems with hydroids and in the long term they probably will start to disappear on their own...unfortunately that doesn't help my ailing corals in the short term

[mark]

I tried kalk paste to no effect.

Turned off the pumps slowly encased them in paste for hours and a few hour after the pumps back on, they were out again.