I'm assuming you have the ProTec stuff. If it is and I wanted to add more if you don't have another container use a zip lock bag and pour some of it into the bag. Keep that for a regular glitter coat.
Take what's left and depending on what colors you want add them in. Most of us use glitter from Hobby Lobby, Michaels, AC Moore, JoAnnes Fabrics and when we cure we lower the heat and extend the cure time. I use fine and extra fine. I don't buy the premade stuff - I get clear powder and dump all the glitter into it, heat the jig, dip your base coat, reheat and dip in the glitter clear. Are you looking for a heavier show of glitter than this
Here's some of the glitter I use -