Is that a straight tube, or perc'd?
wait so your saying smoke contains soot and tar... weird
at least its just marijuana smoke and not nasty ass tobacco... that shit will kill you
blow any smoke or vape through a napkin and they will almost all look that way.
Ive rolled up about 30 ciggie filters into about a 2" round filter, all standing on end of course. It was just taped over the bong outlet. It worked well. Be good to be able to buy single filters in that aprox size.What I wanted to chime in about was the fact that you just discovered a way to filter your bong - albeit a rough set up... those of us bent on torching things could theoretically utilize/devise some sort of filter for bongs. I mean... I just did it, and the smoke/tar left behind did NOT enter my lungs thanks to your simple devise.