Here we tell you how to fill nitrogen gas in pixels: gently pick up the pixel bottle in which you want to fill nitrogen, Gently open up the pixel bottle cap and start to fill the sides of the pixels with the help of a nitrogen cylinder pipe. Why we use fill sides because the chemical will bump outside from the bottles because of the pressure of the gas. Why do we use nitrogen specifically? Simple: it’s an inert gas, meaning that it’s non-combustible and will help prevent fires and explosions. Why we fill nitrogen in pixels: to remove oxygen and moisture from them. YES! it is a fact. Additionally, nitrogen helps to displace oxygen, thus preserving the integrity of products that otherwise would degrade in oxygen’s presence.