Starting a starter
I'm attempting to start my own starter. I've found a raw potato starter that was very simple (1 1/4 AP flour, medium potato grated, 1 cup water, 1 tsp of sugar and 1 tsp of salt). Mind you, I used water that I had boiled potatoes in early in the day, but was reheated to 110F
This morning 'sponge' is very dark! (almost black or purple)
Is this normal?