Now you have seeds and this is where the art form begins. You don't want to "crash" it out of solution. You want the micro crystals that aren't even visible to attach themselves to the seeds. You want the entire surface of the growing seeds to stay in flux, going back and forth between soluble and insoluble. This way, the particles crashing out of solution "glue" themselves to the seed in a way that it's all one single crystal. You have three chambers to move the solution between to acheive this, room temp, refrigerator, and freezer.