I find that a gravity bong works exceedingly well for enhanced leaf or changa which is covered by a very thin layer of cannabis. The size of the bowl on mine is jut the right size for a blast off dose of enhanced leaf and always works every single time for me.

IMHO I wouldn't use crystal in a gravity bong as it is more sensitive to heat than enhanced leaf is. The best benefit of a gravity bong is that I am able to efficiently vaporize my entire dose in one solid rip every single time. If you don't want to spend a couple hours converting your spice to enhanced leaf, i'd suggest you use a GVG. If you don't want to spend beaucoup bucks on a GVG, i'd suggest using a gravity bong.

However, one modification I must suggest is that you get a 1/4" socket and use that as your bowl (melt the socket into the bottle cap and make sure the seal around where the socket is inserted is airtight). This makeshift bowl has enough carrying capacity for a breakthrough dose of changa/enhanced leaf and is sure to leave every and any psychonaut pleasantly pleased with the results.

If you have not yet tried using a gravity bonga to smoalk da changa, you are missing out...