Need help, zoa not feeling well

[grisha]

Hi there, for a couple of month some frags and colonies in my tank get this condition when skirts get really short and individual polyps closing.
some polyps melt away, most stay in rough shape, sick looking for weeks
Could you guys give me ideas on how to deal with it.
I gave 2 colonies CoralRX 7 min dip,but to no result
I’m at loss

 

[Copingwithpods]

Are you blasting them with too much light? It seams in my tank the zoas closer to the light seam to have the shortest skirts like retreating as far as they can backwards.

 

[grisha]

Nope, I believe light is not an issue. Not all zoa feeling unwell. Just persistent plaque jumping from polyp to polyp , sort of infecting one after another

 

[Copingwithpods]

Tested parameters lately?

 

[grisha]

Mainly keep an eye on temp:salinity
What should I be on look out for?

 

[Copingwithpods]

Nitrate, phosphate and if you exclusively have softies to a lesser degree calcium, alkalinity and magnesium.

 

[grisha]

any Ideas in bacterial issue realm?

 

[Copingwithpods]

I don't see any films on your zoas, check the parameters above, specially alk, a big swing can stress them out