Twin pack of replacement media for our Medium sized Infusers. Each package will purify, mineralize and alkalize 540 litres of water approximately 3 months supply. Our Medium sized dispensers are perfect for a 2-3 litre jug. Allow 1.5 hours to purify and mineralize. For the best results leave over night. Simply fill the infuser with the new activated and mineralizing stones and rinse under cold tap water till the fines are rinsed and the water runs clear, then simply place in your container.