Hi Gustavo, are you discarding some starter each time you feed it? I would recommend discarding all but 40g of starter, anf feeding that 40g water and 40g rye flour at least every 24 hours. Once the starter begins rising predictably (twice), then you'll want to shift to twice a day feedings, which will help to keep the yeast more active. As long as your starter shows no more signs of mold and develops a more pleasant aroma as it begins to rise consistently, then I think it's fine to continue! 

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