Crystal catchers are nice, they give you keef, which you can scrape into your bowl for a really nice buzz. I would definitely recommend keef catcher, but no, it's not necessary.

Mine is a green keef catcher with an extra compartment at the top. I like it.
graph Reviewed by graph on . what grinder i need some help on purchasing a grinder i have been using a sharp knife up until now but what type of grinder would you recomend (are crystal catchers necesary if you dont plan on pressing it?) any help would be great. Rating: 5