You get back what goes into the gravity bong. If there are little pieces of ash going through the bowl, then you are going to push it right back into your lungs, along with a shit load of THC.
Dr.Hashman Reviewed by Dr.Hashman on . Are gravity bongs bad for lungs? I was wondering if gravity bongs were necessarily worse than regular bongs or worse than any other way of smoking? I'm asking because the method that has to be used. All the smoke being forced into the lungs and all that. Do you guys think it has greater health risks or what? Rating: 5