^ That is absolutely the best thing to recommend in terms of safety. I might be wrong here, but I think the main reason people don't promote that one as much is because it's not as pure, even though it's full-melt. So, it gunks up atomizers in a way that solvent concentrates do not. I might be wrong here, so please don't get mad at me if I am, lol. I don't make bubble hash so I'm not speaking from experience... just anecdotal information I've picked up from others...