Just wondering how fast one can build up a starter. i started w/liquid yeast. put it in 1/2 quart (500 mL) of starter. i assume you double it each time you want to build up the volume. how often can you double the volume? my goal is close to 5 L of starter (5 quarts for you Americanos). it will take me quite a while if I'm doubling it like i currently am.