Featherdusters or Hydroids? (pic)

[Alaska_Phil]

Dang, I've got these too, though they haven't spread in a year now. In fact they seem to be shrinking. I really don't want to torch the rock since it's also covered in feather duster worms and has my chili corals on it. Although, this might explain why the chilis aren't doing too well.

Where does one get kalk to make the past with? Maybe I'll just try moving the chili's to a new 'clean' rock and toss this one.

Phil

 

[TTSupra]

The kalk mix is just taking kalk and mixing it with a low concentration of water. So it's kind of pasty, but not runny. Then just squirt it in their mouths with a syringe, and when they close, coat them a little more in it. Remember to turn your powerheads off when you do it, so kalk paste isn't randomly blowing around on corals.

You can get kalk (kalkwasser) from places like marinedepot.com.

 

[tush]

be careful trying to remove hydroids by plucking - i have had these type of hydroids in my main tank for over a year and they dont seem to spread at all...there ARE hydroids that look like dandelions i have in another tank that have strangled all the zoas in the tank, tried to strangle tubeworms - they have a threadlike root system that wraps around everything. When i saw the first clump spreading, i tried pulling them - MISTAKE!!!
when one gets loose... it replants itself somewhere. I ended up having to redo the entire tank with new rock. even cooked they came back. ( i thought i had a pic to post.. but its missing)