I hired a guy with a trackhoe and trackloader. He does plumbing work mostly but no experience on ponds. I'm pretty much just pointing the finger and he digs. I run my front end loader tractor and spread what he digs, raking out debris and packing with my tractor wheels. I've been searching online for bentonite but can't find anything local. Not much on pond experts either. I just moved to the area from out of state so I know no one here. I'm kinda at the mercy of goggle for local info.