Zoa dying ?! Help

[mr. penguin]

So I got a new zoa piece Saturday. I floated it for 15 mins for temp and then ran drip acclimation for an hour. I put it in my tank and it opened fine. It also opened Sunday. However, it didn't open at all yesterday or today. All of my
levels seem fine. The exact same thing happened with a hammer coral I got a few months ago (opened for a day or two and then never again).

I have a 28gal euro with a Current USA Marine led light. Could it be the light?

I moved the zoa to my nano tank and will leave the lights off to see if it recovers. I placed it in the sandbed just as it was in the store and then tried it 1" up on a rock.

Please help! I can't keep losing corals after 1 day!

 

[Joeganja]

check phosphates

 

[650-IS350]

Did you properly acclimate them to your lighting? Start at bottom, not directly under the lights, then as time progresses move them under the light more then higher up the rock work.