Hi, I made red grape wine for the first time and I am not using any wine kit. My question is how much water to add to your wine during primary fermentation. With 60kg of grapes I added only 15 litres of water. A friend of mine who has been making red grape wine for a long time told me that if he has for example 10 litres of crushed grapes he adds 10 litres of water ( he also adds sugar with water like I do ) so the mix is half grapes and half water. Did I add enough water and can I add water now that the secondary fermentation is ready?