Kettle fining, there are 15 tabs in a sealed bag each tab is sufficient for 50 litres.

Whirlfloc is a purifed form of high molecular weight carrageenan extracted from red marine algae (Rhodophycae) and manufactured exclusively for use as a wort fining agent. It accelerates the formation of dense and compact hot and cold trub, saving time, boosting wort recovery and resulting in considerably brighter worts.