When I first got my mocha clowns they were very small. I put them in an acclimation box directly above the anemone I wanted them to host . As soon as i let them out they went wild and have never left it. if you can remove the anemone and fish and put them in an acc box until they want to be in it , then place the anemone and leave clowns so they can see it for a few then release them and see what happens . I could be wrong but might work . gl