Liquids for pre-ferments & soakers?
What kinds of liquids have folks used for pre-ferments (poolish, most likely) or for soaking grains? I've tried kombucha (very nice; just need a little bit), milk kefir (made a poolish with this for the Christmas stollen; yummy!) and of course beer (the DH's home-made ale). I'm wondering about different fruit juices (citrus? pineapple? apple cider?), different kinds of tea (black, green, flavoured) or other things. Maybe tomato juice, for example?