Whole wheat ciabatta

These are some pics of whole wheat ciabatta with fermented wheat berries and flax seed loaves I made the other day.  I made them with a sourdough I started by using the leftover water from boiled potatoes, whole wheat, and white flour.  The culture sprung up very quickly using this method.  I wasn't originally intending to make ciabatta, but the dough was so wet i needed to fold it in flour and use a couche to keep it together.  I only had enough room in the oven for three smaller loaves and one large monster that I proofed in a basket.  Has anyone else used potato water in their starters?  I have another culture forming now now using rye flour and potato water that looks quite nice.