Zoa's dying....not sure what to do...HELP!

[Sweet7]

So I bought a colony of Zoanthids from live aquaria. I dipped them in lugols (15 min with 40 drops in a one gallon bucket as I do with all new arrivals) I put them in my tank after a rinse with fresh nutri-seawater. They were doing fine for the first 3-4 days then they just started melting away and they have this brown slime on them which looks to have spread to the neighboring colony. Not sure what to do here, should I leave it and wait and see? Cut away the dead stuff and hope for the best? Remove it and others effected? Any help would be greatly appreciated as I'm no veteran. My water parameters are all stable ph 8.2, ammonia 0, nitrite 0, nitrate >5, kh 9, calcium 440, phosphates 0. Everything else in my tank including other zoas are thriving, I just don't want this to spread or know if it will or not. I just did a 20% water change today, not sure if that will help or hinder the problem. Thanks in advance!

 

[akitareefer]

I'd pull the rock out and dip again. remove all the slimy dead parts and gently rub off film on closed polyps. This sort of thing can happen to anyone

 

[3Dsam]

i would cut away any dead polyps (make sure its the dead ones and not just ones that are closed) and see if you can clean some of that stuff off them.
above all else i would also recommend a furan-2 dip. best stuff in my experience for any type of bacterial infection on zoas. you will need to dip 3 days in a row 20 mins at a time, let them rest for a few days then dip for another 3 consecutive days. i use one sachet for 1 liter of tank water and try to have the temp of the dip a couple of degrees warmer than your tank temp, it helps the stuff work.

and tbh with you, i would dip all your zoas even if they are totally unaffected by the slime stuff. better safe than sorry, speaking from experience its worth the hassle

 

[joshporksandwich]

Those big colonies are always a pain. If they're not looking good try to salvage what you can. Cut the ones that look good and put them somewhere low in your tank.

 

[Sweet7]

Thanks for the advice. I pulled some of the definite dead ones off of the rock tonight. They oozed this brown smelly stuff when I squeezed them so I'm pretty sure they were decomposing. Just hoping it sticks to the one rock and it's just a case with this one colony.

 

[duke4130]

All of the parameters look fine. Try dipping the rock in a gallon of saltwater with a capful of TLF ReVive. Use a turkey baster to get into the all the crevices of the rock. Keep in there for a good 10 minutes constantly blowing with the baster. After minutes dip in a second bucket with clean salt water to wash off any of the excess ReVive. The revive will clear out all the pests if any and help the polyps bounce back.