The first two were drip acclimated with the anemone. Took about three hours, seemed fine when I put them in. The other two little one's and the big one, I just floated for thirty minutes then they were released into the tank. They also appeared fine until morning. Yeah, can't say with a hundred percent certainty what happened. Just stinks that so many clowns have been lost. The clowns were all tank raised, and so I don't think it was stress from being captured from the ocean and then transferred. All the clowns appeared healthy when purchased and when released into the tank, all ate frozen mysis. They were all on the small side except the last, he was a big one about two and a half inches.