This Red Wine Production Kits provide all the additives your need to make 100L professional quality red wine. It also includes an easy step by step instruction guide. Each of the 5 sachet contained within this pack tells you what day of the fermentation process each pack is to be used. It takes the guess work out of winemaking. The 100L Wine production pack contains sufficient ingredients for approximately 10 boxes of grapes. How it Works: Day 1 pack 1 - Potassium Metabisulphite - Grape steriliser to kill all wild yeast and bacteria that otherwise will spoil your wine. Day 1 pack 2 - Pectic Enzyme assists in extracting more juice from the crushed grapes and assists in clearing the wine and getting more colour from the skins when making red wine. Day 2 Pack 1 - Yeast Energiser - This is our special recipe Yeast food which will assist in vigorous and healthy fermentation from start to finish. Day 2 Pack 2 - Wine Yeast - A premium grade commercial wine yeast specially selected for its flavour profile and robust characteristics. Day 4 - Yeast Energiser - it is now time to give the yeast a little more nutrients to ensure a very healthy fermentation. End of Ferment - Potassium Metabisulphite - Once again you add grape preservative to finished wine to ensure it does not spoil or turn to vinegar. This is a vital step.