I have been reading through most of the threads on this post and came across the discussions about using BHB as a training local. I can totaly relate to the complaints about the dive instructors with the dozens students. I was in Three Sisters Spring on memorial day and man there where a lot of classes out there. There were more students than anything in the spring head...on memorial day. Anyways, I know everyone has to start out in these classes, and I'm definetly not hating, but man was the water mucked up. So when i read about "rototilling", i just laughed. just sayin.