Zoas staying closed

[leepink23]

The last 3 days my zoas and star polyps close most of the day. I haven't changed anything. My sps look good. I have had most of the zoas for 2-3 months and star polyps a year. I have been getting cyano on my sand again so not sure if that could cause it? Nitrates 1-2, phosphates. 01, ph 8.1, temp 77.8. All corals were dipped before going in the tank. I do vacuum out the cyano, should I just wait it out?

 

[TheLadyCrash]

What is your Alk at?

Also, check your salinity. If you have a refractometer, make sure to calibrate it with the salt solution first (not distilled water). I lost most of my zoas (they just melted away) due to my salinity being off because I was calibrating with distilled water.

 

[leepink23]

Salinity is 1.024 with refractometer calibrated by distilled water, it also shows that with my apex, alkalinity is 8.2 on hannah checker.

 

[leepink23]

I will re-calibrate with salt solution though just to verify.

 

[DSC reef]

I will re-calibrate with salt solution though just to verify.

Good idea, I had better results using calibration fluid with the refractometer. I also calibrate each time I test salinity.