Pro tip: I gave up on my starter after 3 weeks, then a baker in Tulsa told me one word
My sourdough starter sat on the counter for 22 days and barely bubbled, so I dumped half of it last Tuesday and almost tossed the jar. A guy at the Tulsa farmers market looked at my photos and said the water was the problem, our tap stuff is too treated. I switched to bottled spring water, same flour, same jar, and it doubled in 6 hours. Now I keep a gallon jug under the sink just for feeding it. Anyone else run into water killing their starter, or was I just lucky with the switch?