Have I killed my corals

[Milner]

Is my coral dying , new to this and worried I’ve killed my coral, I’ve attached photos, any help would be great

 

[Travis]

Some are obviously polyped out and looking good. Zoanthids are pretty hardy. If it looks like white stuff is melting off or chunks of it coming off the rock, you may have some dead tissue. I'd recommend removing as much of that as possible if you see it - that will mess up your water quality and could kill the rest.

Speaking of water quality, what are your parameters? Is the tank cycled?

Welcome, hope we can be a valuable resource for you!

 

[Milner]

Tank nearly cycled but got impatient, nearly there nitrate is high but just add nite out from lfs , fingers crossed all good I hope should I do a part water change, thank you for your help

 

[Travis]

Yes I'd do a 20% water change. Are your nitrites high or are your nitrAtes high? I'm guessing the former

How high is high?

 

[PSU4ME]

I think I’d do a few changes while monitoring levels. Might be good to look at something like microbacter 7 to help things.