Healthy zoas suddenly withers

[clownfish_forever]

Hi bros,

i have a small colonies of pink zoas which started with 4 polyps and grow to 15 polyps. But suddenly the colonies just die off slowly. There are other colonies of zoas which are doing fine. And I have checked no zoas pests and no aggressive coral near it. Wonder what causes this. Any view?

Thank you.

[Kelvin81]

Mine because cover by algae. I use a soft brush on it and manage to safe some. Just share my experience.

[surreal1228]

Any white spots found on the body? Or bad smell ? A photo would be easier to tell.

[Evolutionz]

i also have a 3 polyp eagle eye that sometimes open half way, sometimes closed and sometimes opening nicely.. seems like it depends on its mood..

anyway how long did it take for u to grow that zoa from 4 to 15 polyps?

[rainmalawi]

I have a few frags which was doing great and for no apparent reason, stopped opening. After a while, they will shrink and turn dark and end of the game. This happens while other frags are doing fine.

[weekdaywarrior]

this also happens to me to both wild and cultured zoas the thing that puzzles me is the other zoas are growing like weeds which have already encrusted in the LR.

[Kelvin81]

If the body appearing with white spot. What are they? Any advise?

[Evolutionz]

i wonder do lighting play a part? since we place our zoa on different level and depth of the tank.. i noticed my 3 polyp eagle eye when i place on sand bed, its totally closed.. after a few days i shifted to my frag station which is much higher and all 3 opened up fully for a few days.. right now only 1 open halfway..all my other zoas are opening up and growing baby zoas. strange...

[Neutral]

My Zoas also having prob.. only fully open in one side.. the rest are 1/2 open too. Had change varies locations, but its still the same.. any Shi fu able to help?

[Evolutionz]

have you checked for pest?

[azlindaza]

My zoa come out black liquid from the opening? Poison gas?

[Kayakkite]

Mine have white spot too. But after a few days, they disappeared. It seems that those zoas with white spot will not open fully.

I think might the water change solving the problem.

[surreal1228]

If the body appearing with white spot. What are they? Any advise?

you can google Zoa pox, which are white lesions on zoanthids and palythoas. They start small on the stalks, generally towards the base, and gradually work their way towards the head of the zoa or paly. The zoa or paly will then close up due to irritation, and will eventually recede and die as the ZoaPox covers the entire head.

there are a couple of method to cure them, works fine,but have to take action early. it can be spread to others in your tank.

My zoa come out black liquid from the opening? Poison gas?

keep monitoring it as it can be normal if still looks fat fat, but it may melt off from then.

i wonder do lighting play a part? since we place our zoa on different level and depth of the tank.. i noticed my 3 polyp eagle eye when i place on sand bed, its totally closed.. after a few days i shifted to my frag station which is much higher and all 3 opened up fully for a few days.. right now only 1 open halfway..all my other zoas are opening up and growing baby zoas. strange...

my own experience, lighting can help but not the cause.

i got many frags on sand base.

but system different can be various cases

[Evolutionz]

thanks for your reply.. this few days the eagle eye is fully shut.. no idea what's happening.

[Royston]

I got somewhat the same problem with my stardust zoas after shifting to a lower placement after a rescaping of rocks alot of palys are now shut.

[clownfish_forever]

I have attached a photo of the pink zoa problem I mentioned.

Previously all 15 polyps are opened big and strong...

now...can see some of the polyps withers off and some of the open polyps are smaller...

I dont see zoa pox...i.e. no white spots

[rainmalawi]

If zoa pox, I used Furan 2 and it is effective. But I have to follow the medication routine from zoaid.com for a couple of days. Mine was infected badly by zoa pox as I did not know about zoa pox until I smell trouble and did some research. My zoas recover very well from zoa pox after the treatment.

[evomclaren]

Try changing water