Yes they are completely aware of them. I've even offered him my leftover flatworm exit package. The prof that looks after the tank chooses not to treat because his students look at the flatworms in some of their labs each year. He has tried a few natural controls to try and reduce their population such as wrasse, dragonet and nudibranchs. But they just keep on living.

... and another one bites the dust. With the showing of Craig's recently setup 120gal we concluded The PG Reef Tank Tour for another year. For one last time I'd like to say thank you to everyone who participated this year. If it wasn't for people willing to show their systems and for others to come and see them, there would be no Tank Tour and I'd be awfully bored January through March. :wink:

http://i254.photobucket.com/albums/h...o/IMG_9069.jpg

http://i254.photobucket.com/albums/h...o/IMG_9075.jpg