The purple one was easy to get off the rock, a little bit of air and he let go, the white one however was on a rock that was stuck in the ground, so I had to work a little bit to get him off safely and make sure not to hurt him.
Thanks for the lookout thor, we are aware of the rules, but very good info for people who may read this and are not aware.
Just a note, neither of the anemones suffered any damage during the collecting, and are looking very awesome in the tank!