Hi Ellen, I'm sorry to say I don't have experience with this type of sourdough recipe, but from my brief research online it looks similar to this recipe. I don't think this type of starter is going to perform well in terms of contributing to your bread rising, but it may offer some flavor enhancement. I would follow the directions in terms of refrigerating and feeding, and keep in mind that this type of starter is likely to work best in recipes that were written to include it. I doubt it will substitute well into our sourdough recipes. 

I'm sorry I couldn't be more helpful! 

Barb

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