We've got some trouble in paradise.
So as some background, my most recent water change was this Saturday, three days ago. Ca was at 440 and all other parameters were fine (don't have my own test kit so I got my water tested at the pet store when I went to get more saltwater. Waiting for a good one to go on sale).
Before doing the water change, all of my new zoas were acting up (Radioactive dragon eye, eagle eye, and utter chaos). They were all closed up or half closed, not fully opened and pretty. At this point, all of them have been in my tank for about a month; the UC was always open and it was the RDEs and the EEs that were giving me problems. On the advice of another zoa keeper, those two got a peroxide dip.
Nothing had happened in the tank other than a hermit crab knocking my Fat Head Den on top of my UC; even then it was still open though.
Following the peroxide dip, my UC polyp starts acting up, Mind you, it was fine before and didn't receive a dip.
Now after the water change on Saturday, UC still has not opened up and the polyp looks likes it regressing? At the same time, my Monti cap (which was also fine on Saturday during the water change) has started bleaching?! The Monti has also been in my tank for a month and was totally fine. Its mounted on a magnet so I have it at the surface of the water where the par is the highest. It's directly across from my wavemaker so it's getting good flow. And, I feed the tank a mix of benepets and Reef Chili so there is food in there small enough for it to eat.
I've been checking for flatworms on both but I see none or any eggs. Any clue as to what's going on? I don't want to lose either of these corals!