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Need some help identifying, as many of my zoas are starting to close up and seem to have white spots. I never have had an issue with zoas, so not sure what it can be.https://uploads.tapatalk-cdn.com/202...734c98aa35.jpg
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Did you dip them before adding them to your tank?
I dip everything before adding into my tank. These zoas I have had for well over a year. I have not bought anything new for my tank; therefore, no new corals have been introduced for about 4 -5 months. Only thing I have done is water changes and feeding frozen food .
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It looks like zoa pox from what I read and have bought furan 2 which comes in tomorrow.
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Did you already try running some brand new carbon? even though you're doing water changes there could still be stuff building up that's inhibiting your zoas. Other zoa experts here could chime in on what to dip with for the fungus but toxic substances could definitely compromise their immune system making them more susceptible. It's pricey but maybe invest in an ICP test to give you the full picture.
Maybe try an iodine dip on one col and see if it does the trick.
Kinda looks like zoa pox or algae bugging them making them stay closed. It doesnt look like nudis to me. I would dip in iodine solution or revive...if its multiple colonies then dip one and see if it helps.
Have you noticed any livestock missing ( fish/ large inverts) might be a spike due to something dying that wasnt noticed.
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