I agree with Ajm , releasing them late evening when the wrasse has put himself to bed probably a good idea ,
Only problem you might find is the wrasse are predator fish naturally in the wild , they scour around the live rock for the pests in you’re tank and stuck bits of food .
He will eventually find them and say thank you very much for the expensive snack (as Ajm mentioned) .
There is aptasia fish , that loves the stuff and will munch away on it 24/7 if it wanted to .
I’ll find a picture of it and post it , from what I remember they’re not the most good looking fish in pack but will eat all the aptasia you have in the tank .