Place the neopixels on the bottom of the jar, with some space in between. This way it prevents the crystals from growing on the bottom side of the board so you have a clean surface to work on later on.
**NOTE**: Don't put your neopixels in when the water is still hot because your alum will melt in hot water. I would like to quote from Loes' description to know when is a good time: "I compare it to tea: if it's nice and hot and you'd drink it. It's too hot. If it gets to the point where you think "I have to drink it now, if I wait a minure longer it will be cold" that's a good moment to put the crystal in :)"
