100g - 4kg Granular Activated Carbon Filter Spirit water filtration homebrew+Bonus
Premium Granular Water Filtration Activated Carbon suitable for food grade applications and drinking water.
Always pre-wash the carbon with water before use. Suitable for drinking water and food grade applications as well as spirit filtration.
BONUS with Digital Thermometer Temperature LCD Gauge with battery.
From internet....
Important of Controlling Fermentation Temperature
Normal ale fermentation temperatures range from 68 to 72 °F (20 to 22 °C) and lager fermentation temperatures from 45 to 55 °F (7 to 13 °C). Also keep in mind that the heat generated by an active fermentation can warm a typical 5-gallon (19-L) batch of beer by 10 to 15 degrees Fahrenheit (5.5 to 8.3 degrees Celsius).