http://www.canreef.com/vbulletin/sho...threadid=62346
Unfortunately, Lawnmower Blennies are touch and go, they also hate to chew on long HA. I have actually had experience with a Brown Bar Goby (Dragon Goby), where I saw it take a mouthfull of HA and rip it off the rock, but that doesn't get rid of the roots unfortunately.
Ken - BWA