Zoas closing up :-(

[yareck8308]

How can keep my zoas healthy. My water is absolutely fine. Been ok for months but last 3 weeks looks closed up. How can I help it

 

[AwwNuts]

Any signs of zoa pox

 

[650-IS350]

what's your Alk, pH and Salinity at?

Are your equipment calibrated properly to ensure the readings their giving you are on par.