IIRC, bongs are much more effective with vaporizers.
Since the cannabis does not go thru combustion, you are left with a lighter vapor in which the THC does not get trapped in the water. I'm not 100% sure though.

I've been using a bong with my vape for a few months now and the water stays clear and hardly even turned amber like it does when smoking.
I'm sure that it's still effective, because I've been using a lot less herb (cut my amount used by almost half).
I have my knob dialed in at around the 11 o'clock position which is still hot enough to burn my throat. That's why I like to use the water to cool the vapors.
herbal meditation Reviewed by herbal meditation on . Bongs Confirmed Counter-productive by NORML I am pissed. My last purchase was a nice new bong. i don't like bongs much, but i wanted to be healthy and get good, big hits. apparently, bongs are worse for the health than all other moethods except vaping. also, they waste THC because a good bit is lost in the water. this was all pointed out in a thread called "so i just got really bored and stuffed a cig full of weed" by Zad515 link to NORML study: </title> <meta http-equiv="Content-Type" content="text/html;"> <style> Rating: 5