I just started hiitting the essence, do I need to get a new piece or can I convert my old bong?

Dr Kronic would reccomend that you get a new piece.  The bongs you use for toking flower are made for just that, toking flower.  When you are smoking the essence you need very little air, therefore making a small piece better.  There are also options with Health Stones, vapor pens, and other ways to do your essence.  Head down to Shell Shock to talk to a representative today