Random, Large-scale Zoa Polyp Death

[Madelion33]

Their write up is super informative, seems to cover those bases.

 

[A. grandis]

What you have there is a serious bacterial infection!!!
Remove all the infected zoanthids and threat out of the main system, in a hospital tank!
You can try first Lugol's solution locally in the tank with the ones that aren't showing the symptoms yet with the pumps off and see if it helps. Water changes... Watch everyday many times to catch any infection before it gets to them.
Lugol's will do the trick but you'll need persistence and water changes to help, removing the excess of it.
If you can't relief the system with Lugol's solution you'll need to treat the whole system with Erythromycin!
Act fast! Do it now. The longer it goes the more polyps you'll loose.
Keep temperature at 78F max.
Good luck!

Grandis.

 

[TheEngineer]

What you have there is a serious bacterial infection!!!
Remove all the infected zoanthids and threat out of the main system, in a hospital tank!
You can try first Lugol's solution locally in the tank with the ones that aren't showing the symptoms yet with the pumps off and see if it helps. Water changes... Watch everyday many times to catch any infection before it gets to them.
Lugol's will do the trick but you'll need persistence and water changes to help, removing the excess of it.
If you can't relief the system with Lugol's solution you'll need to treat the whole system with Erythromycin!
Act fast! Do it now. The longer it goes the more polyps you'll loose.
Keep temperature at 78F max.
Good luck!

Grandis.

I've tried a few rounds of antibiotics. Hasn't seemed to stem the tide here.

 

[A. grandis]

I've tried a few rounds of antibiotics. Hasn't seemed to stem the tide here.

Have you tried what I've suggested yet?
Grandis.

 

[Dave770]

I've experimented similar situations. It's depressing to watch a colony die off with no explanation.

 

[A. grandis]

I've experimented similar situations. It's depressing to watch a colony die off with no explanation.

The explanation is bacterial infection.
The solution is the proper treatment.

Grandis.

 

[wattson]

Erythromycin,,you want him to use this on his whole reef system ?? Isnt this medication cyano medication ?? at what dose do you suggest ? also ,,using this antibiotic,,will there be adverse reactions in the system from its use ??

 

[Jonathan Presseau]

The explanation is bacterial infection.
The solution is the proper treatment.

Grandis.

Any idea how these infections occur? How can they be prevented?

When I watch a healthy colony melt in days/weeks (no changes, water quality good, other zoas happy) and it is free of algae and fungus - just dies - I always feel that the zoa got sick and could not recover on it's own.

If I get pneumonia and do not go to the doctor it will not end well either.