What are these?

IPT

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Man, I bought some zoa frags and inspected them and keep them in a seprate tank for a about a week. Dipped with Coral RX and did a H202 dip too. Now about a 2 weeks later I am taking macro photos in my tank and first off notice some Aptasia! I took the frags out removed the plugs if they had any aptasia. I cut away any healthy polyps and tossed any that had aptasia on them or in between the polyps. Hopefully (fingers crossed) I found them early enough.

Now I am diligently inspecting these frags (or what's left of them) and I notice some algae of course and some filaments. At first I thought it was algae or just some hairs from the CA glue I used to mount. On closer inspection, I don't know what they are, but they for sure have stalks and some sort of tentacles. They are whipsy thin (you can see the size of the closed Zoa for reference. I only see them on a few of the frags and I hate to toss even more, but what are these and need I care?

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Crabs McJones

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Hydroids
 
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IPT

IPT

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Ugh, that's what i was afraid of....

I just covered them in kalk paste and out of the tank tried to pull off as much as I can. Then I rinsed them off in another container. Ugh, I hate to toss the frags.

Maybe more H202 dips?
 
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IPT

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Does anything kill these, or should I try and cut away a polyp if I can and toss the rest?
 

Peace River

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