I have a Ritteri Anemone that has been in my 55 gallon tank for about 3 weeks now. Recently, it started MAJORLY deflating at night, with a gaping mouth and all... but during the day it looks normal. I’ve tried feeding him A frozen silverside but he didn’t want it. A week later I tried feeding frozen krill, but he also didn’t eat those. What is going on here? He’s height up on the rocks to reach the lights (I have two Current USA LED light bars) and he’s near my power head so he gets pretty good flow. He hasn’t tried to move himself so I’m assuming his location is fine. What else is it? Is he sick? Hungry? I’ve done a partial water change and that didn’t affect him at all either. No other changes have been made since he was added. I’ve attached a video of what it looks like at night time.