I am trying to make Sake from a recipe that my girlfriend found. It has you cook 6 pounds of rice in five gallons of water and put the rice into a sack (the same for making beer) and add 10 pounds of sugar, 1 teaspoon of acid blend and 10 cut up plumbs. Before starting the yeast it was reading a SG of
1.090. We are on day 6 and the SG has only dropped to 1.080. I can see CO2 bubbles, but it not eaten the sugar. Is this normal in Sake?