The Grainfather counterflow chiller is used after boiling the wort to cool it down fermentation temperature. The counterflow does this by acting as a heat exchange between the wort and water from your tap as you transfer the wort from your boil kettle to your fermenter. Because this is a one-step process of transferring and cooling, it is more efficient and more sanitary than immersion chillers, and the curved design allows for similar performance to plate chillers without the crevasses that can make cleaning painful. 

100% pure Sodium Percarbonate, supplied in a zip-lock bag.

Sodium Percarbonate is a fantastic cleaner for brewers, as it reacts with organic matter to produce oxygen, and the resulting bubbles help lift dirt off surfaces with the minimum of fuss. It can also be used as a sanitiser at the right concentration.

Sodium Percarbonate is an excellent cleaner and is also getting a reputation as an "eco friendly laundry detergent" due to it's low impact on the environment.