So I’ve had a brackish tank for about 4 years for my puffers (see image) and some unfortunate events led to them dying -_-. So I decided to convert to full salt. I got these zoas and they came out the first day or 2 when I got them. After I did a water change of about 20% they closed up. They’ve been closed for about 3 days. I put them in the sand bed and let the hermits clean them up and then peroxide dipped. I cut them off the plug today and glued them on. Crazy thing is they opened up when my nitrates were around 120-150 (due to puffers, and yes I know what I was doing.) and now they’re not showing me anything. Any ideas ? Besides levels, water flow, and lights? Need help asap, don’t want to lose them!