Zoa’s not opening

[Nano Gabe]

For the last couple weeks my zoa’s have been closed up. I’ve had them for a long time and haven’t added anything new. I’m not seeing any pests any all my other corals are doing great. They are all near the bottom of my tank so I don’t think lighting is the problem. Any idea what the issue is? Ive been running some carbon in case it’s something in the water but they have not improved

 

[Euphyllia97]

Water parameters?

My guess is that your tank might be to clean. Zoas like dirty water!