Disappearing Zoas

[Mikey Donuts]

I just noticed that a small colony (5 large polyps) of zoanthids disappeared overnight. I haven't seen any predators in the system although a couple of other colonies haven't opened up for a while. I've got two peppermint shrimp (heard they can aquire a taste for zoos). The fish are small gobies, a percula, and a female solar wrasse.

-Would nudis be able to wipe out five large polyps in a few hours?

-If they are the culprits, can I dose the tank with flatworm exit to kill them? I know of at least one person who has successfully done this. Pulling out individual colonies would be a royal pain since they are dispersed throughout the tank and they are growing on the rocks.

-I can't think of anything in my system that could do this except for the peps, or possibly nudis.

Any advice is appreciated,
Mike

 

[surfsharkus]

where did u buy them from?

 

[650-IS350]

Add a predator IF there are NUDI's ( Dip a couple to see if you have any )..

6line, yellow coris or green seagrass wrasses are known predators of nudis, flatworms and pods ( some do eat zoos )...

 

[Mikey Donuts]

I actually found the missing cluster. I had them in the same spot for a week and it seems that wasn't enough time for them to attach. They were bulldozed off the rock by a Trochus and fell underneath a cluster of cloves. Yes, I feel like a dumb@ss, but I'm relieved that they're still alive.
Some of the zoos I mentioned in another post still haven't opened up yet though (10 days) and I'm seeing small white spiral shaped clusters on some polyps now. I'm going to dose the flatworm exit and see if that helps. Everything I've read says that it's totally reef safe, so I guess there's no harm in trying.
I got the zoos from everywhere including a bunch of local stores & hobbyists. It really is a very nice collection and if there is a parasite, it's my fault for not quarantining. I'll post again after I use the Exit.
Thanks for the help!