Well, if the hash your smoking is bubbling up while you smoke it, that's some full melt hash. "Bubble hash" is just referring to the method used to make it which is bubble bags... all hash is good to me though.
wrong wrong and wrong.
Straight hash is the hard rock dry packed hash, bubble is covered with oil (sugar leaves) so it bubbles and melts slightly but still on the inside burns (these tend to be higher thc %'s, I just purchased some Alien Kush Bubble with 49% thc, a sativa hash) and a full melt, like its name suggests, fully melts into oil form and obviously also bubbles, then hardens again, but you can reheat it to melt it again. Full Melts rang between 50-75% thc in the medical marijuana world. Bubbles range at about 35-50% thc. Basic, good high to top shelf bud is anywhere between 12-24% thc. (just a reference for those of you who arent medical patients). I know this because the place I go to tests all their concentrates n bud via a SteepHill testing lab. Ciao.
-Bay Area, Cali Medical Patient.