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You need to determine if you have a wort problem or a yeast problem. The way to do that is with a fast ferment test (sometimes called forced ferment test). Put some of the wort in a small sanitized container. You need enough to be able to take a gravity reading. Add a LOT of yeast to the sample...even bread yeast is fine for this since we want to know if ...


3

To fix this beer, I would raise the temperature to 55F and leave it for another couple of weeks. Assuming sanitation is good the beer will be ok. 1.7l is on the small side even for a stirred starter for a 1.060 lager, and airation doesn't provide the dissolved oxygen levels needed. (ca. 15ppm.) In future, aim for a 4-5l starter and yeast nutrient. If you ...


1

Try getting the must pH to greater than 5,aim for around 5.4. Then add some extra yeast. Only do this if your addition of CaCO3 was not successfully fixed the pH.



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