Hello everyone. I have this caulastrea for 3 weeks. Everything was perfect ntil 3 days ago when the lower head started to shrink (not yet exposing skeleton, just it isn't fluffy as it used to be). The last thing I did wrong is I feed it larger piece of frozen shrimp that I bought from the supermarket (I live in a small town and here we don't have coral food). The poor head was struggling to eat it, but finally after 2 hours it swallowed the piece. After that event it never fluffed up as much as before. I was thinking it might be something else, but the other two larger heads are as fluffy as ever. I also feed them with the same shrimp from the supermarket.