Let them out of the strainer. Put the anemone on a rock somewhere so it gets the lighting it needs to survive. The clownfish will stay around the anemone if they are interested in it. Just let nature do its magic. It takes the clownfish a little while to develop the mucus over its body that will prevent it from getting stung by the anemone. They will brush up against it lightly and eventually will take the "plunge." Give it time and they will take to it. If for some odd reason they don't go into it then try a different type of anemone other than a bubble tip. Usually they prefer bubble tips but some clownfish can be picky.
Hope this helps!