Daisy like creature on Zoa colony

[ryrod17]

Hello all, I had my tank up and running almost 8-9 months. All my colonies started as a single polyp bought mainly from Vivid and WWC.
I dip 5-10 minutes before adding to tank with Coral Rx.
However, I have these Daisy like things growing on my Zoas and it seems to be irritating them.
Any idea what they might be?

tried getting the best images and video I could. Any help would be awesome.



Ammonia 0ppm
Nitrite 0ppm
Nitrate 5ppm
Salinity 1.025
Phosphate 0.55ppm
Alk 8.6 dkh
Mag 1300
Cal unknown

 

[ISpeakForTheSeas]

Hard to see in the pics and the videos don’t load on my phone, but it looks like hydroid polyps (hydroids in their sessile life stage) to me. They reportedly sting corals, so I’d guess you’re right about them irritating the zoas.

Welcome to Reef2Reef!

 

[ryrod17]

Hard to see in the pics and the videos don’t load on my phone, but it looks like hydroid polyps (hydroids in their sessile life stage) to me. They reportedly sting corals, so I’d guess you’re right about them irritating the zoas.

Welcome to Reef2Reef!

Thank you! Anyway to get rid of them? I read about some that starts with fen(can’t remember the rest of the spelling) does that work? This tank has been active 8-9 months and I noticed the corals irritated.
Thank you

 

[ISpeakForTheSeas]

Thank you! Anyway to get rid of them? I read about some that starts with fen(can’t remember the rest of the spelling) does that work? This tank has been active 8-9 months and I noticed the corals irritated.
Thank you

Fenbendazole is the word you’re looking for, but I don’t recall how effective it is against hydroids at the moment. The quote below is best I’ve got for hydroids.

Agreed with hydroids:
I've heard smothering the hydroids with kalk paste may work, but here are some other threads with suggestions that might be helpful:

Hydroids: a reference to some strategies

Like many of us, I have had problems on and off over the years with Hydroids. The ones that have always given me the most problems are the common ones that almost look like a smaller and darker version of the beginner coral called Yellow Polyps. But the colonial Hydroid is much smaller than...

www.reef2reef.com

Hydroids - How do I eliminate- They have taken over my tank

So I have this stuff that has pretty much taken over my tank and I can't get rid of it. I'm looking for an ID and an eradication plan that is anything short of a total teardown.

www.reef2reef.com