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Ler

I have found in my bong that cold water or ice while making a hit smoother can sometimes lead to pain, I've heard that the smoke expands in your lungs, which would be painful if I packed my smoke in there than usual and then it started to expand. I don't know how valid that point is but it makes basic sense.

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toothfairy420

I dont know if it is actually harmful to use ice, but I use warm water every time I take a gravity bong hit, and they are much easier to take. My theory is that you don't feel as harshed because the steam helps to sooth the lungs. another good thing about hot water is that it helps to expand the blood vessels in your lungs, possibly making the rate of thc absorption go up. cold water or ice might make it possible to take a bigger hit, but you will regret it the moment you start to exhale.