Disapearing Zoas

TheSherm

New member
My zoa colonies are slowly disapearing. Paly's look ok for the most part, but the zoas are going pretty fast. I noticed about 10 days ago- zoas started closing, then were gone. One whole colony is gone and I see just about all the rest but 2 getting noticably smaller. I have a 30 gallon tank

Livestock- watchman goby, six line wrasse, bangai cardinal, peppermint shrimp, snails, crabs, sandsifting star.

The rest of the corals seem ok- frogspawn, flowerpot, mushrooms, kenya tree, xenia, candy canes are all fine. Duncans look terrible but they haven't looked right in 2 months. The zoas have looked great and been growing well for the last 6 months until 10 days ago. Nothing new has been added to the tank in 2-3 months.

Water parameters seem ok too, I do regular 25% water changes every two weeks, the most recent 6 days ago

PH- 8.0-8.2
Amm- 0
Nitrite- 0
Nitrate- 5-10
Calcium- 500
KH- 8
Phosphates- 0
Salinity- 1.022

Temp could be an issue. I dont have a chiller so since it has gotten warm the temp is between 81-84, but hasn't gone above 84 at all.

I also have a billion tiny white/ brown snails that come out at night, i think they are collonista snails which i thought were ok, but they have been in the tank for a year and i havent had any problems at all so i dont think its them.

Anyone have any ideas?? Any help is much appreciated, I'm losing it over here and have run out of ideas
 
Same thing happened to me. I had 4 different colonies of zoa's growing nicely for 6 months, and all off a sudden they lost their color, closed up and melted away. I lost all of the colonies. I believe zoa pox played a role in this.
 
zoa pox, zoa nudis, zoa spiders? do you dip new additions?
good luck and hopefully it's not any of these cuz they are a PITA.
 
Pox is possible, i do dip new frags and havent added anything in a couple months, which is why i am weirded out that it is happening out of nowhere
 
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