Help?!?!
Bluelighter
An ashcatcher is a seperate piece that is placed on the bong where the bowl would be placed and then you put the bowl in the ashcatchers joint. Its pretty much like a small extra filter but the main reason I enjoy them is because they build up resin instead of your bong. I mean you still get small amounts of resin in it but no where near as much and if your like me and cherish a newly cleaned bong then its perfect. A perc is an extra filtration system put inside of the bong and are usually tree or dome percs(might be another kind but I can't seem to remember). Tree percs have two or three arms extending into the water in the small extra chamber. Dome percs are cylinder esque and hollow and have a small piece of glass going upwards into the dome and the water is at the bottom of the dome which has small slits for the smoke to travel through.