i once had a friend a teacher a mentor,,he had those things that test everything,,a speed freek,,the best one when it comes to pot,,,anyway,,,yes,,there is traces of all kinds of shit,,we checked and it holds hemp,from sides of one of my pipes i tried yrs ago,,before we went our ways,,it held thc it held resin it held mold,,it held acid,from already shitty water,,remember the water is staganat,,,,but back then,,we hardly ever changed water,,and i know every day change it,,but now i dont have to change shit,,,this guy could not shut up enough about bong water and why not to use it,,but,,he new what he was talking about,,he went to prison for making ntl news for growing,,he was a homemade chemest,,he would talk my head off,,i listened,,he was always on speed,,so i could do nothing but listen,,he proved himself to be the best in what he does,,once again look at water,,how did it get that colour,,why is it that colour,,i just say that myths are made to be broken finnally,,,,thats all my 69 cents worth,,,someone prove to me that thc is water solliable,,or ever how you spell it,,,ill shit my pants,,,dont trust books till you try it,,,,,dont show me it in writing,,it is a myth if you think it is water sollable or however you spell it,,even if only one percent trace,,it adds up man,,,so now how many people will test there bong water after a while of use,,not changed every day,,,Jack