I've had a yellow tang for several months now. My wife really wanted to have a purple tang.. I researched the issue and found varing opinions as to their sutability together. My lfs got a couple in and so I thought I'd give it a go. Long story short... The yellow will not leave the purple alone for 1 minute. I'd like to switch them out and have been trying to catch the yellow, but I'm finding it impossible. (do you know they are both fast and smart?) Meanwhile I have relocated the purple to my sump for safety. Does anyone have a good way to catch a tang?