Carol, there are as many potential starter recipes as there are bakers in the world, I reckon! There's no ultimate right or wrong when it comes to baking bread, sourdough included. Do whatever works for you, in your kitchen; I happen to like this particular starter method, but if you want to use potato water, there's no harm in that, certainly. Enjoy - and welcome back to the wonderful world of sourdough. PJH

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