I just recently about 4 or 5 days ago purchased a green long tentacle anemone. ever since I put in my tank and never acted right it would never set up it was and it would always lay on its side. this morning when I woke up it was all shriveled up and letting off this white cloudy stuff. it wasn't quite dads but just about so I took it out but now my water is really cloudy. I did a 20 percent water change because of the fear of it polluting my tank and me losing all the rest of my fish. I guess my question is is this type of situation dangerous for the rest of my tank?