hey people im completely new to this and my first brew is using a 'Young's' red & white wine yeast fermenting home juiced blackberry juice about 1 1/2 of the juice to 9 1/2 litres water & 1kg sugar i also added a youngs yeast compound containing yeast and some chemicals that are probably yeast food, its been in for two weeks and gone a bit sour and i dont have a clue what could have caused it or how to cure it or even if there is a cure, can anyone please help me?
much appreciated
much appreciated