Keep the fire above 0, but below 200. Different materials can change the color of fire. (chemically accurate.) Here is how much each fuel makes the fire grow. Wood: 5 Coal: 10 Gas: 20 Oil: 50 Condensed O2: Sets the flame to 199. Borax: 15 Potassium Chloride: 30 Copper: 60
thanks to TheTwinjas for the original project